supersession

Since various, cause has not given a test to maneb zinc supersession thing second braces sulfurs urea (ETU).

由于因未对代森锰锌的代谢物乙撑硫脲（ETU）进检测。

Fluorine is an important trace bio-essential element.Its deficiency or excess related to geological setting can cause organism distortion or supersession abnormality.

是重要微量生命元素,生环境量或缺乏均会导致机体畸变或代谢异常。