supersession

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

由于各种原因未对森锰锌的乙撑硫脲（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.

氟是重生命元素,原生环境中氟过或缺乏均会导致机体畸变或异常。