oxygen containing functional group造句

例句与造句

1. The benefit of peat is that it is usually 2-3 times higher in fulvic acid content, which are the low molecular weight fractions of humic acid that are high in oxygen containing functional groups and soluble at a low pH of < 1.
2. It's difficult to find oxygen containing functional group in a sentence. 用oxygen containing functional group造句挺难的