✅ 同义词
🗣️ 情景例句
May I see you in my office?
你可以到我的办公室来一下么？
Study sickness while you are well.
居安思危。
The man had connected the air-line to a supply line of oxygen, not compressed air.
这个工人把供气管接到了氧气供应管上，而不是接到压缩空气管上。