Shuttling
n. 往复运动；梭动
🗣️ 情景例句
I'm exhausted. I had to work until 2 o'clock this morning.
我累死了。我一直得干到今天早上2:00。
No, I'm sorry, sir. We don't accept checks.
先生，对不起，我们不接受支票。
Yes, he has.He sold it last week.
是的，卖掉了。他上星期卖掉的。