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

茶叶中铅的含量是衡量茶叶卫生状况的重要指标之一。

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

茶叶中铅的含量是衡量茶叶卫生状况的重要指标之一。

youdao