This increases their air-resistance 这样就加大了空气阻力
and reduces the shock of impact when they hit the ground. 并减小了它们落地时冲击力带来的震动。
Have you taken the air-resistance into consideration? 你把空气阻力的因素考虑进去了吗？
The present case needs to reduce the air-resistance to the minimum.
现在需要的是把空气阻力减小到最低限度。 impact 冲击力，冲击
The impact of the molecules against each other would be nearly equal.
分子相互间的冲击将几乎是相等的。
The September 11th event produced a dreadful impact on the minds of the Americans.
“9。11”事件对美国国民的心理造成了极大的冲击。
新概念英语词汇随身听速记手册3新概念3词汇 10-12
Southampton
南安普敦（英国港市）
The great ship,Titanic,sailed from New York from Southampton on April 10th.1912
巨轮“泰坦尼克号”1912年4月10日人南安普敦起锚驶向纽约。 colossal 巨大的，庞大的
Even by modern standards,the 46,000 ton Titanic was a colossal ship.
即使用现代标准，46，000吨的“泰坦尼克号”也算得上一艘巨轮。 The colossal statue stands in the center square, 巨像耸立在中心广场，
superciliously inspecting the city and its dwellers. 傲慢地检阅着志市和它的居民。
I don't know how to tell you about my colossal mistake. 我犯了一个极大的错误，不知道怎么跟你说才好。 watertight
隔水的；密封的；天衣无缝的，无懈可击的
At that time,however,she was not only the largest ship that had ever been built,
在那个时候，这艘轮船不仅是造船史上最大的一条船； but was regarded as unsinkable;for she had sixteen watertight compartments.