🧩 词语组成解析
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
How many cups are you going to order?
你要订几杯？
If there had not been a hard layer of rock beneath the soil, they would have completed the job in a few hours.
如果不是因为土壤下面有一层坚硬的岩石，他们的营救工作仅用几个小时就可以完成了。