A-series
一系列
🧩 词语组成解析
🗣️ 情景例句
It's not difficult.
这不难。
Why does only one sock get lost at a time?
为什么袜子只丢了一只呢？
He has worked there since it opened in 1989.
从1989年这家工厂开办起，他就在这儿工作。