Unique identification
[计] 唯一标识
🧩 词语组成解析
🗣️ 情景例句
So far so good.
到目前为止一切都好。
This is a story.
这是一个故事。
I asked a passenger if this was the Westhaven Express, but he had not even heard of it.
我问一位乘客，这是不是开往威斯特海温的那趟快车，他说从未听说过有这么一趟快车。