Methoxyprophylline
美索茶碱
🗣️ 情景例句
The rural workforce has been flowing in to the cities ever since the open door policy was adopted.
自从改革开放政策实施以来，农付劳动力正不断流向城市。
If I have time tomorrow,I think I'll get a haircut.
如果我明天有时间，我认为我应该理发。
Last Wednesday, I went for a walk in the woods.
上星期三我到树林里去散步。