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
What do you think? Does it look promising?
你怎么想？ 希望大吗？
What is learnt in the cradle lasts (or is carried) to the grave.
小时学会的事情到老不会忘记。
Luckily the weather was not so wet as it is today.
幸运的是，那天的天气不像今天这样有雨。