西迪基100米短跑的最好成绩是11.81秒，这也是她于今年四月创下的巴基斯坦全国新记录，她200米短跑的最好成绩是24.36秒，两个项目的成绩都远不及世界顶级水平。

Siddiqui's best time for the 100m is 11.81 seconds, a Pakistani record she set in April, and 24.36 seconds in the 200m which are both a far cry from top international standards.

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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.

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液体的速率对墙体具有相称性，如图1中，当气泡呈离散式分布时为流体速度0.3米/秒，相应的气泡上升速率为0.7米/秒。

The liquid velocity is symmetric towards the wall. Values in (1) are 0.3 m/s for the discrete bubble pattern (where bubble rising velocities are 0.7 m/s).

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Occasionally, you'll find you need to cancel out units, because, of course, you're always doing unit analysis as you solve your problems, and sometimes you'll need to convert joules to kilogram meters square per second squared.

偶然地，你会发现需要消除单位，因为在解题时,经常要做单位分析，所以有时候需要把,焦耳换做,一千克乘以米的平方除以秒的平方。

麻省理工公开课 - 化学原理课程节选

If the units are supposed to come out in meters per second and you get seconds per meter, what do you figure the chances of that problem being right are?

因为如果单位本应该是米每秒,但你写的是秒每米，你认为这个题目,还有正确的机会吗？

麻省理工公开课 - 固态化学导论课程节选

The seconds cross out, the kilograms cross out, one of the meters crosses out from the top, so we're left with an answer in meters.

秒消掉了，千克消掉了，单位米和上面的一起约去了，所以我们得到的答案只剩下米。

麻省理工公开课 - 化学原理课程节选