Stds
(STD 的复数) [计] 标准
🗣️ 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。
He deserves praise.
他应得称赞。
The clouds had come down so suddenly we had no warning.
乌云突然出现，我们丝毫没有觉察。