茶叶中铅的含量是衡量茶叶卫生状况的重要指标之一。

The content of lead in the tealeaf is one of important guild line scaling the status of the tealeafs sanitation by it.

youdao

茶叶中铅的含量是衡量茶叶卫生状况的重要指标之一。

The content of lead in the tealeaf is one of important guild line scaling the status of the tealeafs sanitation by it.

youdao