Ssn
abbr. 子系统号（Subsystem Number）；（美）社会保险号（Social Security Number）；智力严重逊常（Severely Subnormal）
🗣️ 情景例句
We have to talk the matter over now.
我们必须讨论一下这件事。
This problem is hard to solve.
要解决这个问题不简单。
I immediately regretted answering in the way I did, but I said, 'I enjoy cleaning windows at night.'
“我喜欢在夜里擦窗子。”