纯度

huà xué chún dù

化学纯度

chemical purity

pǐn zhǒng chún dù

品种纯度

varietal purity

kōng qì chún dù

空气纯度

air purity

cè dìng chún dù

测定纯度

determine the purity

yín de chún dù

银的纯度

silver purity

shuǐ chún dù yào dìng qī jiǎn cè

水纯度要定期检测。

The purity of the water is tested regularly.