例句與造句

1. Among the water quality indicators , cfu - 100ml means the number of colony forming units in 100 ml water ; ntu means nephelometric turbidity unit , and for drinking water , 1 mg l 1 ppm one part per million
   水質(zhì)指標(biāo)單位中， cfu 100ml表示每100毫升水樣中菌落形成單位數(shù)colony forming unit ： ntu為濁度表示單位nephelometric turbidity unit 。對飲用水而言， 1mg l毫克每公升1ppm百萬分之一含量。
2. It's difficult to find turbidity unit in a sentence. 用turbidity unit造句挺難的