Activity variable
[经] 效率变量, 活动变量
🧩 词语组成解析
🗣️ 情景例句
that you have strawberry and vanilla ice cream.
让你吃到草莓和香草的冰淇淋。
Could you do me a favor?
我想请你帮个忙。
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信，因为我俩的时间都很紧。我们都有做不完的事。