R "is a replaceable function, e. G. Acetoxy, methoxy, their acyloxy and alkoxy homologs or halo."

是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。

youdao

Participants of production, application, QC and R&D in automotive or related industries e. g. plastic and rubber, coating, adhesive, metal and textile are welcome to attend the symposium.

热烈欢迎从事塑料、 涂料、橡胶、粘合胶等高分子材料、纺织材料、金属及 防护层研究、生产、应用、检测的有关单位和各界人士参加本次盛会。

youdao

A list of American colleges and universities that offer financial aid to foreign students can be found at edupass.org -- e-d-u-p-a-s-s dot o-r-g.

VOA: special.2009.02.05

The address is u-s-a-l-e-a-r-n-s dot o-r-g.

VOA: special.2009.01.15