✅ 同义词
🗣️ 情景例句
I'm having some trouble keeping food down.
我吃东西时感到困难。
I must say that I'm a little at a loss as to how to introduce them.
我必须表明对于如何介绍他们，我有点不知所措。
Do you call that printing?
你们把那种方法叫做印刷术吗？