Switching function
[计] 开关函数
🧩 词语组成解析
[计] 交换\\n[经] 转换, 调换, 调头
🗣️ 情景例句
It will take a few years for the region to recover economically.
这个地区的经济恢复得花几年的时间。
How much is a call to the United states?
打一个电话到美国去需要多少钱？
It's very kind of you to call.
谢谢你来告诉我。