1、智课网 TOEFL备考资料老托福听力93篇(3-4)-Located at the NASA分享到：摘要： 老托福听力93 篇(3-4)-Located at the NASA。今天小编为大家准备老托福听力93篇(3-4)-Located at the NASA，这是一套很不错的资料，大家可以看看哦。3Located 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,
2、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 l
3、owered 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
4、 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 treadm
5、ill, 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 sp
6、ace 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】1. gallon: n. AmE a unit for measuring liquids, equal to 3.785 litres 【美】加仑( 等于3.785升)2. vat: n. Ca very large container for storing liquids such as whi
7、sky or dye, when they are being made(酿酒、盛染料用的)大缸，大桶3. tank: n. Ca large container for storing liquid or gas(盛放液体或气体的) 大容器4. treadmill: n. Ca 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5. aerospace: adj. involving the designing and building of airc
8、raft and space vehicles 航空和航天(器制造)的 n.Uthe industry that designs and builds aircraft and space vehicles 航空和航天工业，航天工业6. scuba diving: n. Uthe 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)7. simulate: v. to make or pr
9、oduce something that is not real but has the appearance of being real 模仿，模拟8. Martian: adj. of or relating to the planet Mars 火星的9. stride: n. Ca long step 大步，阔步10. elbow: n. Cthe joint where your arms bends 肘4Welcome to Everglades National Park. The Everglades is a watery plain covered with saw gra
10、ss thats home to numerous species of plants and wildlife. At one and a half million acres, its 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 its home to many of the plants and animals ty
11、pically associated with the Everglades. Youll see many exotic birds and, of course, our world famous alligators. Dont worry, theres 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
12、the saw grass prairie. From there well head to some other marshy and even jungle like areas that feature wonderful tropical plant life. For those of you whod like a closer view of the saw grass prairie, you might consider renting a canoe sometime during your visit here. However, dont do this unless
13、you have a very good sense of direction and can negotiate your way through tall grass. Wed hate to have to come looking for you. You have the good fortune of being here in the winterthe best time of year to visit. During the spring and summer, the mosquitoes will just about eat you alive! Right now
14、theyre not so bothersome, but youll still want to use an insect repellent.【 生词摘录】1. Everglades National Park: 大沼泽地国家公园2. saw grass: 克拉莎草;加州砖子苗3. acre: n. Ca unit for measuring area, equal to 4,047 square metres 英亩4. sampling: n. items selected at random from a population and used to test hypotheses
15、about the population 取样，抽样，采样5. exotic: adj. approving seeming unusual and exciting because of being connected with a foreign country 【褒义】异国风情的，外国情调的： exotic birds 外国的奇异鸟类6. alligator: n. Ca large animal with a long mouth and sharp teeth that lies in the hot wet parts of the US and China 短吻鳄7. board
16、walk: n. CAmE a raised path made of wood, usually built next to the sea【美 】(常在海滨 )用木板铺成的小道8. prairie: n. Ca wide open area of land in North America which is covered in grass or wheat(北美洲的 )大草原9. canoe: n. Ca long light boat that is pointed at both ends and which you move along using a paddle 独木舟，小划子
17、10. negotiate: v. 成功通过，顺利越过11. mosquito: n. Ca small flying insect that sucks the blood of people and animals 蚊子12. repellent: n. C,Ua substance that keeps insects away 驱虫剂推荐新闻:IBT听力 OG听力-iBTListening-ETS音频(Mp3)IBT听力 OG听力-iBTListening-ETS-track(二)(Mp3)IBT听力 OG听力-iBTListening-ETS-track-(三)相关字搜索： 托福听力考试
