Sandcalcite
沙方解石
🗣️ 情景例句
John Marchetta gave me my start here six years ago,
六年前 ，John Marchetta让我在这儿起步，
First come, first served.
先来先卖。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？