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1. The gram is a metric unit.
    克是公制单位。

2. There are 1 , 000 grams in a kilogram , which is the metric way of saying how heavy something is.
    一公斤分为一千克,这是表示重量的十进制方法。

3. Although Britain and France both use the metric system and the same electrical voltage (220 volts), it sometimes seems as if they have little else in common.
    尽管英法两国都使用公制和相同的电压(220伏),有时候看上去倒是少有类同。