Conditionla macroexpansion
[计] 条件宏扩展
🧩 词语组成解析
[计] 宏指令扩展
🗣️ 情景例句
What a pleasant surprise running into you.
碰见你真是太棒了！
To watch the accident
观察意外事故的现场
Sorry, I haven't. Why don't you ask Jim.
对不起，我没见。你为什么不去问问吉姆呢？