Feng Xin: I poured a glass of milk I just bought from the supermarket. How do I know if the milk is safe to drink?

冯欣：我倒了一杯刚买的牛奶，我怎样知道这杯牛奶是安全的呢？

youdao

Feng Xin: I poured a glass of milk I just bought from the supermarket. How do I know if the milk is safe to drink?

冯欣：我倒了一杯刚买的牛奶，我怎样知道这杯牛奶是安全的呢？

youdao