现在，千克，这最后一个以人工制品定义的单位，正等待着自身的转变。

Now the kilogram, the last artefact-based unit, awaits its turn.

youdao

现在，千克，这最后一个以人工制品定义的单位，正等待着自身的转变。

Now the kilogram, the last artefact-based unit, awaits its turn.

youdao