Backstand
张紧座; 后座; 支撑结构
🗣️ 情景例句
Tom gave Helen an apple in exchange for a piece of cake.
汤姆用一个苹果和海沦换一块蛋糕。
A still tongue makes a wise head.
智者寡言。
Never mind. So now you know what you should do.
不要紧。好了，现在你知道该怎么做了吧。