A hunk of platinum and iridium known as the International Prototype Kilogram or IPK. The IPK isn't just how much a kilogram weighs.
一大块铂和铱,称为国际原型千克或 IPK。 IPK 不仅仅是一公斤的重量。
单词 | International Prototype Kilogram |
例句 |
原声例句
化学 Crash Course A hunk of platinum and iridium known as the International Prototype Kilogram or IPK. The IPK isn't just how much a kilogram weighs. 一大块铂和铱,称为国际原型千克或 IPK。 IPK 不仅仅是一公斤的重量。 |
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