SI unit

劍橋詞典

a unit of measurement that is part of a system used for scientific and technical work all over the world
國(guó)際標(biāo)準(zhǔn)單位
The SI unit of length is the metre . 長(zhǎng)度的國(guó)際標(biāo)準(zhǔn)單位是米。 返回 SI unit