The international prototype kilogram, the primary standard (see weights and measures) for weight, is made of an alloy comprising 90% platinum and 10% iridium.
国际标准质量千克的原型就是由90%铂和10%铱的合金制成的。
It was then necessary to produce the two prototype standards (metre and kilogram) on to which the measurements would be copied for distribution across France.
就在那时，需要去产生两个标准的原型(米，公斤)，根据这两个标准的原型，度量衡才能复制到法国各地。
It was then necessary to produce the two prototype standards (metre and kilogram) on to which the measurements would be copied for distribution across France.
就在那时，需要去产生两个标准的原型(米，公斤)，根据这两个标准的原型，度量衡才能复制到法国各地。
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