About 60% of water suppliers still fluoridate the water, so if you're not sure you need to check your local supplier.

大约60%的水供应商仍然在饮水中添加氟素。所以即时你不确定是否需要制止当地供应商。

youdao

About 60% of water suppliers still fluoridate the water, so if you're not sure you need to check your local supplier.

大约60%的水供应商仍然在饮水中添加氟素。所以即时你不确定是否需要制止当地供应商。

youdao