因此1米长的钟摆，所用周期是2秒。
So a pendulum one meter long has a period of about two seconds.
在2006年，他以12.88秒的成绩打破110米栏的世界纪录。
In 2006, he shattered the event's world record with his 12.88 time.
光的传播速度为299，792千米/秒，是凭借加速所不可能超越的。
That speed, beyond which it is impossible to accelerate, is 299,792km a second.
这位百米冠军以十分之一秒之差获胜。
The hundred meters champion managed to get home by a tenth of a second.
乔在百米短跑赛中以一秒之差打败去年冠军。
Joe beat out last year's champion in the 100-meter sprint by one second.
几乎对于所有人来说，9秒钟之内跑完100米都很困难。
It's difficult for almost everybody to run 100-meter in 9 seconds.
几乎对于所有人来说，9秒钟之内跑完100米都很困难。
It's difficult for almost everybody to run 100-meter in 9 seconds.
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