Helen: This way, the milk acts as a protective barrier between the cup and the hot tea.

如果要避免这种现象，那就应该先在杯子里加点冷牛奶，再倒热茶。

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With plastic cup as protective cover, directive spraying of roundup water agent is safe for seedlings, of better weeding effect, and to save time and money.

用一次性塑料杯作防护罩，草甘膦水剂定向喷雾，对苗木安全、除草效果好、省工、省钱，比人工除草节约成本74%。

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