Perfect elastic collision
[化] 完全弹性碰撞
🧩 词语组成解析
🗣️ 情景例句
Where are the shopping carts?
购物车在哪儿？
Reading and listening to music is the ultimate in relaxation.
一面读书，一面听音乐是最佳的休息。
Neither, thanks. I think I'll just have a glass of water.
那个都行。我想还是来一杯水吧。