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teer for at least one community activity before they graduate. A new community program called "One On One" helps elementary students who've fallen behind. You education majors might be especially interested in it because it offers the opportunity to do some teaching―that is, tutoring in math and English. You'd have to volunteer two hours a week for one semester. You can choose to help a child with math, English, or both. Half-hour lessons are fine, so you could do a half hour of each subject two days a week. Professor Dodge will act as a mentor to the tutors―he'll be available to help you with lesson plans or to offer suggestions for activities. He has office hours every Tuesday and Thursday afternoon. You can sign up for the program with him and begin the tutoring next week. I'm sure you'll enjoy this community service and you'll gain valuable experience at the same time. It looks good on your resume, too, showing that you've had experience with children and that you care about your community. If you'd like to sign up, or if you have any questions, stop by Professor Dodge's office this week.
【生词摘录】component: n.［C］one of several parts that together make up a whole machine or system （机器或系统的）零件；成分；组成部分tutor: n. ［C］someone who teaches one pupil or a small group, and is directly paid by them 家庭教师，私人教师v. to teach someone as a tutor 给…当家庭教师；指导mentor: n. ［C］an experienced person who advises and helps a less experienced person 顾问，指导人，教练2
I hope you've all finished reading the assigned chapter on insurance so that you're prepared for our discussion today. But, before we start, I'd like to mention a few things your text doesn't go into. It's interesting to note that insurance has existed in some form for a very long time. The earliest insurance policies were what we called bottomry contracts. They provided shipping protection for merchants as far back as 3000 B.C. In general, the contracts were often no more than verbal agreements. They granted loans to merchants with the understanding that if a particular shipment of goods was lost at sea, the loan didn't have to be repaid. Interest on the loans varied according to how risky it was to transport the goods. During periods of heavy piracy at sea, for example, the amount of interest and the cost of the policy went up considerably. So, you can see how insurance helped encourage international trade. Even the most cautious merchants became willing to risk shipping their goods over long distances, not to mention in hazardous weather conditions when they had this kind of protection available. Generally speaking, the basic form of an insurance policy has been pretty much the same since the Middle Ages. There are four points that were salient then and remain paramount in all policies today. The se were outlined in chapter six and will serve as the basis for the rest of today's discussion. Can anyone tell me what one of those points might be?
【生词摘录】insurance: n. ［U］an arrangement with a company in which you pay them money each year and they pay the costs if anything bad happens to you, such as an illness or an accident 保险；the money that you pay regularly to an insurance company 保险费；the business of providing insurance 保险业bottomry: n. 船舶抵押契约（如船舶损失，则债务取消），冒险借贷contract: n. ［C］a formal written agreement between two or more people, which says what each person must do for the other 契约；合同loan: n. ［C］an amount of money that you borrow from a bank etc （银行等的）贷款understanding: n. ［C usually singular］a private, unofficial agreement（私底下、非正式的）协议，协定interest: n. ［U］a charge made for borrowing money（借贷的）利息［+on］piracy: n. the crime of attacking and stealing from ships at sea 海上抢劫，海盗行为cautious: adj. careful to avoid danger or risks 小心的，谨慎的，慎重的hazardous: adj. 危险的salient: adj. formal the salient points or features of something are the most important or most noticeable parts of it 【正式】显著的，突出的paramount: adj. more important than anything else 至高无上的，最重要的3
Located at the NASA Research Center in Iowa is a 5,000-gallon vat of water, and inside the tank is an underwater treadmill designed by Dava Newman, an aerospace engineer. For four years Newman observed scuba divers as they simulated walking on the Moon and on Mars on her underwater moving belt. She wanted to discover how the gravity of the Moon and of Mars would affect human movement. To do this, Newman attached weights to the divers and then lowered them into the tank and onto the treadmill. These weights were carefully adjusted so that the divers could experience underwater the gravity of the Moon and of Mars as they walked on the treadmill. Newman concluded that walking on Mars will probably be easier than walking on the Moon. The Moon has less gravity than Mars does, so at lunar gravity, the divers struggled to keep their balance and walked awkwardly. But at Martian gravity, the divers had greater traction and stability and could easily adjust to a pace of 1.5 miles per hour. As Newman gradually increased the speed of the treadmill, the divers took longer, graceful strides until they comfortably settled into an even quicker pace. Newman also noted that at Martian gravity, the divers needed less oxygen. The data Newman collected will help in the future design of Martian space suits. Compared to lunar space suits, Martian space suits will require smaller air tanks; and, to allow for freer movement, the elbow and knee areas of the space suits will also be altered.
【生词摘录】gallon: n. AmE a unit for measuring liquids, equal to 3.785 litres 【美】加仑（等于3.785升）vat: n. ［C］a very large container for storing liquids such as whisky or dye, when they are being made（酿酒、盛染料用的）大缸，大桶tank: n. ［C］a large container for storing liquid or gas（盛放液体或气体的）大容器treadmill: n. ［C］a mill worked in the past by prisoners treading on steps fixed to a very large wheel（过去用以惩罚犯人的）踏车aerospace: adj. involving the designing and building of aircraft and space vehicles 航空和航天（器制造）的n.［U］the industry that designs and builds aircraft and space vehicles 航空和航天工业，航天工业scuba diving: n. ［U］the sport of swimming under water while breathing through a tube connected to a container of air on your back 斯库巴潜泳，水肺潜泳（戴自携式潜水呼吸器潜泳）simulate: v. to make or produce something that is not real but has the appearance of being real 模仿，模拟Martian: adj. of or relating to the planet Mars 火星的stride: n. ［C］a long step 大步，阔步elbow: n. ［C］the joint where your arms bends 肘Dava Newman
Professor of Aeronautics and Astronautics and Engineering Systems
Director of Technology and Policy Program
Mac Vicar Faculty Fellow
4
Welcome to Everglades National Park. The Everglades is a watery plain covered with saw grass that's home to numerous species of plants and wildlife. At one and a half million acres, it's too big to see it all today, but this tour will offer you a good sampling. Our tour bus will stop first at Taylor Slough. This is a good place to start because it's home to many of the plants and animals typically associated with the Everglades. You'll see many exotic birds and, of course, our world famous alligators. Don't worry, there's a boardwalk that goes across the marsh, so you can look down at the animals in the water from a safe distance. The boardwalk is high enough to give you a great view of the saw grass prairie. From there we'll head to some other marshy and even jungle like areas that feature wonderful tropical plant life. For those of you who'd like a closer view of the saw grass prairie, you might consider renting a canoe sometime during your visit here. However, don't do this unless you have a very good sense of direction and can negotiate your way through tall grass. We'd hate to have to come