“净度”例句

单词 净度 例句 DEFINITIVE EXAMPLES 权威例句〔CLEAN〕There is concern about the purity of our tap water. 我们的自来水的纯净度令人担心。朗文写作活用〔NEED/NECESSARY〕For the second year in a row, the city's water supply has failed to meet minimum purity re...