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托福字典:propulsion托福考试详解

编辑:share 来源: 美联出国考试 发布时间:2016-10-25

文章摘要: propulsion这个托福词汇在托福考试TPO中考题出现在了OG当中,是什么意思呢?本文美联出国考试小编给大家整理了托福字典:propulsion托福考试详解一文。

propulsion是什么意思?propulsion这个托福词汇在托福考试TPO中考题出现在了OG当中,是什么意思呢?本文美联出国考试小编给大家整理了托福字典:propulsion托福考试详解一文,希望对大家备考托福有所帮助。

托福考题出处:OG

Paragraph 5: An even more exciting find was reported in 1994, also from Pakistan. The now extinct whale Ambulocetus natans ("the walking whale that swam") lived in the Tethys Sea 49 million years ago. It lived around 3 million years after Pakicetus but 9 million before Basilosaurus. The fossil luckily includes a good portion of the hind legs. The legs were strong and ended in long feet very much like those of a modern pinniped. The legs were certainly functional both on land and at sea. The whale retained a tail and lacked a fluke, the major means of locomotion in modern cetaceans. The structure of the backbone shows, however, that Ambulocetus swam like modern whales by moving the rear portion of its body up and down, even though a fluke was missing. The large hind legs were used for propulsion in water. On land, where it probably bred and gave birth, Ambulocetus may have moved around very much like a modern sea lion. It was undoubtedly a whale that linked life on land with life at sea. 【OG- The Origins of Cetaceans】

11. The word “propulsion” in the passage is closest in meaning to

A.staying afloat

B.changing direction

C.decreasing weight

D.moving forward

正确答案:D

propulsion详细解析

1.propulsion [prəˈpʌlʃn ] n.推进;推进力

TOEFL例句:The large hind legs were used for propulsion in water.——OG: The Origins of Cetaceans

大的后肢通常被当成水中前行的发动机。

词根词缀记忆:pro-pul-ion

pro-=forward,如“proliferation”(增殖;繁殖)(TPO-33: Extinction Episodes of the Past) pul=drive,如“impulse”(冲动)(OG:Aggression)

-ion*抽象名词后缀,表示“行为”“过程”,如“selection”(选择)(TPO-17: Symbiotic Relationships)

以上内容来自:《新托福千词百练

2.propulsion 英 [prəˈpʌlʃn] 美 [prəˈpʌlʃən]

n. 推进;推进力

N-UNCOUNT 推进力 Propulsion is the power that moves something, especially a vehicle, in a forward direction.

例句:Interest in jet propulsion was now growing at the Air Ministry.航空部对喷气推进的兴趣正在增加。

以上内容来自:《柯林斯词典》

更多托福词汇解读,欢迎联系美联出国考试》》【定制专属复习方案】或【免费咨询电话:010-5338 2562】。

 

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