Lubricating
润滑的
✅ 同义词
🗣️ 情景例句
Hi! What happened?
嗨 ！怎么回事？
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。
I've no idea. He just asked me to come round for supper.
我也不知道，他只是叫我过来吃晚饭。