Valid state
[计] 有效状态
🧩 词语组成解析
🗣️ 情景例句
I was when I first came to the United States.
当我刚到美国来的时候是感到有点紧张。
But last year we had a big one.
但去年下了大雪。
Have you ever put your trousers in the washing machine and then remembered there was a large bank note in your back pocket?
你有没有把裤子塞洗衣机，然后又想在裤子的后兜有一张大面值的纸币？