水常常被污染，而牛奶是用作其他用途和被认为是小孩子的饮品。

Water was often polluted, and milk was both useful for other things and thought to be for children only.

youdao

水常常被污染，而牛奶是用作其他用途和被认为是小孩子的饮品。

Water was often polluted, and milk was both useful for other things and thought to be for children only.

youdao