Shuttling
n. 往复运动；梭动
🗣️ 情景例句
He said I should call him.
他说我可以打电话给他。
When did I say that?
我什么时候说过了？
He became mortally ill a few months before we had planned to go and,
就在他计划回国的前几个月，他突然身患绝症。