它和千克（10升蒸馏水的重量）一起构成了公制计量的基本单位。

Together with the kilogram, initially the mass of a decaliter of distilled water, it formed the basis of the metric system.

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每天负担的重量好像一点一点的减轻了，直到这负担似乎在向上推升着小鸟，而不是小鸟承担着负担。

Every day the burdens seemed lighter and lighter, until the loads seems to be lifting the birds, instead of the birds carrying the burdens.

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如果每个座位减少1公斤的重量，每个客机就可以在一年的时间里节约4万升的燃料。

Just 1kg less per seat can save some 40, 000 litres of fuel per airliner over a year.

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