Pushdown
推下; 后进先出方式
🗣️ 情景例句
Happy birthday, Carl.
生日快乐 ，Carl。
When rogues (or thieves) fall out, honest men come by their own.
盗贼一内哄，好人就自在。
Now, this is the chemistry lab. Have you been in this lab before?
好啦，这是化学实验室。你们以前到过这个实验室吗？