🧩 词语组成解析
🗣️ 情景例句
Is that all for customs formalities?
海关检查就这些了吗？
We can't recall how long it's been.
我们记不起来经历了多久了。
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。