The name is a reference to International Prototype kilogram, as a base unit of mass in the International System of Units.

它的名字和国际单位中表示基本聚合物质质量千克有关。

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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。

youdao

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。

youdao