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【英语时差8,16】自由落体运动(下)

时间:2015-12-02 05:28来源:互联网 提供网友:yajing   字体: [ ]
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    (单词翻译:双击或拖选)

If you got this one wrong, don’t worry: almost everybody does. For some reason the out-and-then-down scenario1 seems more sensible to us. But let’s look at it again. Gravity is always pulling your car downward, even when it’s sitting still on the road. Send the car over a cliff and gravity doesn’t need any time to start acting2. It’s already pulling, just as it was before you left the road. But in this case, the car also has a forward velocity3. That velocity will indeed send it flying outward — but not at the expense of falling downward. The result is that your free-falling car will make a graceful4 arc in the air, moving both downward and outward at the same time. By the way, you had a parachute and dove out just in time. Close one.


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1 scenario lZoxm     
n.剧本,脚本;概要
参考例句:
  • But the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。
  • This is a totally different scenario.这是完全不同的剧本。
2 acting czRzoc     
n.演戏,行为,假装;adj.代理的,临时的,演出用的
参考例句:
  • Ignore her,she's just acting.别理她,她只是假装的。
  • During the seventies,her acting career was in eclipse.在七十年代,她的表演生涯黯然失色。
3 velocity rLYzx     
n.速度,速率
参考例句:
  • Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
  • The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
4 graceful deHza     
adj.优美的,优雅的;得体的
参考例句:
  • His movements on the parallel bars were very graceful.他的双杠动作可帅了!
  • The ballet dancer is so graceful.芭蕾舞演员的姿态是如此的优美。
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