Dopploy
多普勒铸铁
🗣️ 情景例句
It's dangerous to leave your children along while you go shopping.
购物时，把你的孩子单独留在家里是挺危险的。
Which one do you like?
你喜欢哪一个？
The holes are only borings, less than a foot in diameter.
这些洞只不过是一些钻孔，直径不到1英尺。