Channel stection
[机] U形剖面
🧩 词语组成解析
🗣️ 情景例句
When did you come here?
是什么时候来这儿的？
They called us just as we were having dinner.
当我们正在吃晚饭，他们就打电话给了我们。
What did you eat yesterday?
你昨天吃了什么呢？