chemical group造句

1、DMACK is a new brand manufactured by Shangdong Yongtai Chemical Group in Dongying.
DMACK是一个全新的轮胎品牌，由位于东营的山东永泰化工集团有限公司制造。

2、The variable chemical group in an amino acid.
氨基酸中一种可变的化学基团。

3、A chemical group comprising nitrogen bound to two hydrogen atoms.
由氮原子与两个氢原子结合形成的化学基团。