Undertrick
n. [牌]宕墩(指庄家未能完成定约时所宕掉的牌墩)
🗣️ 情景例句
I'm glad to help.
我很乐意帮忙。
Pupil. He is studying.
学生。正在学习。
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前，务必要关上电源，关好窗户。