Regrading
二次筛分
🗣️ 情景例句
Wrap him in the blanket, Dad!
用毯子把他裹好， 爸爸！
We can't rely on him.
我们不能依赖他。
'We mustn't buy things we don't need,' I remarked suddenly.
“我们不应该买我们不需要的东西，”我突然发表意见说，