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1·People in many countries use kilograms, centimeters, square meters, liters, and Celsius. These are all ways to measure things.

许多国家的人使用公斤、厘米、平方米、升和摄氏。这些都是测量事物的方法。

2·People in many countries use kilograms, centimetres, square meters, litres, and Celsius. These are all ways to measure things.

许多国家的人使用公斤、厘米、平方米、升和摄氏，这些都是测量的方法，他们是公制的一部分。

3·People in many countries use kilograms, centimetres, square meters, litres, and Celsius. These are all ways to measure things. They are all part of the metric system.

许多国家的人使用公斤、厘米、平方米、升和摄氏，这些都是测量的方法，他们是公制的一部分。

4·The average size is 3,131 square feet, with a standard deviation of 655 square feet. (Standard deviation is a statistical measure of variance.)

平均大小为 3,131 平方英尺，标准偏差为 655 平方英尺（标准偏差是一个描述差异的统计量度）。

5·Measure a person's general ability; then measure their cleverness, then square both numbers and add them together, then take the square root.

衡量人们的总体能力，然后衡量他们的聪明度，算出两个数字的平方，再把它们相加，最后求出平方根。

6·Once there, they use tape measures, callipers and a hand-held laser to measure the heights and girths of all the trees within a 500-square-metre plot.

到达目标后，在圈定好的500米区域内，他们用卷尺，测径规和手持激光设备对所有树木的高度和树围进行测量。

7·If you're looking for specific square footage, bring a tape measure.

如果你要房子的确切面积，就自带一个卷尺。

8·So now we can measure these times and then we can take the ratio and then we can see that the time that it takes is proportional to the square root of the height.

我们马上来测量时间，再取其比值，接着对比，看时间是否与高度的平方根，成正比。

9·Measure this square and tell me how much material is needed to cover it.

量一下这个正方形，然后告诉我需要用多少材料才能盖过它。

10·Once there, they use tape measures, callipers and a hand-held laser to measure the heights and girths of all the trees within a 500-square-metre plot.

到达目标后，在圈定好的500平方米区域内，他们用卷尺，测径规和手持激光设备对所有树木的高度和树围进行测量。