Ifdef
n. 如果定义了
🗣️ 情景例句
May I speak to Miss Wang?
我可以和王小姐讲话吗？
Don't take any notice of what he says-he's pulling your leg.
别理睬他，他在跟你开玩笑。
He broke his words once again.
他又一次违背了诺言。