Ifdef
n. 如果定义了
🗣️ 情景例句
Nixon also used chopsticks at the welcoming banquet in his honor.
尼克松在为其到来而举办的欢迎宴会上也使用了筷子。
There are no birds of this year in last year's nests.
事过境迁。
I have a letter of introduction here.
我这儿有一封介绍信。