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
All right. Is...is Susan coming?
好吧， Susan来吗？
The window-washer has a dangerous job.
玻璃清洁工担负着危险的工作。
The woman was a visitor. She did not live in London. She lived in the country.
这老太太是位游客，不住在伦敦。