Erv
[医] 呼气储备量
🗣️ 情景例句
But Dad was so exhausted when he came home from work.
但爸爸工作回来时已经累得不得了了。
I don't allow my children to play with toy guns.
我不让自己的孩子玩玩具枪。
Although we can't see these atoms, they really do exist.
虽然我们看不见原子，但它们的确存在。