In a very real sense the IPK is the kilogram.

实际上，IPK 就是千克。

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。

Every other kilogram is exactly the same as the IPK, and the IPK is the lump of metal that decides what that mass is.

每隔一公斤与 IPK 完全相同，而 IPK 是决定该质量的金属块。

A kilogram is defined as being the same mass as the IPK. We made kilograms up just like we made up seconds and weeks and volts and newtons.

一千克被定义为与 IPK 相同的质量。我们编造了千克，就像编造秒、周、伏特和牛顿一样。