英语语法分析

The relative molecular mass of lanolin is 778 by the method of VPO.

采用VPO法测定羊毛脂的数均相对分子质量为778。

The VPO average molecular weight of vacuum residues and asphaltenes all decreased.

减压渣油和正庚烷沥青质的VPO平均相对分子质量都减小了。

With VPO, NMR, IR, the number average molecular of polyether and sulfonation degree of sulfonated polyether were characterized.

通过VPO，NMR，IR测试了聚醚预聚体的分子量，磺酸聚醚的磺化度。