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
once you get to know them.
一旦认识了周围的人以后。
What are you going to do with the books?
你打算拿这些书怎么办？
Hello, Jim! How are you?
吉姆，你好吗？