Pitchwork
急倾斜开采
🗣️ 情景例句
Thank you--
谢谢你。
It seems like I always have bills to pay and he never has any!
我看来好像老是有账单，然而他却完全没有。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，