他100米决赛跑出了10.09秒的速度。
他以9.58秒的速度打破了自己创造的记录。
10秒钟之内最大将达到2200米,同时火球以100米/秒的速度上升。
This increases to a maximum of 2200 m within 10 seconds, at which time the fireball is also rising at the rate of 100 m/sec.
You can ask me where it will be nine seconds from now, eight seconds from now, how fast will it be moving.
你们可以问我九秒后它的位置,或者八秒后,以及它的运动速度
Light travels basically a foot in a nanosecond. Simple rule of thumb.
光行进的速度是每纳秒一英尺,很简单的经验法则了。
It's something I throw up has an initial speed of 10 meters per second.
抛出物体的,初速度是10米/秒
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