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
But Dad was so exhausted when he came home from work.
但爸爸工作回来时已经累得不得了了。
You cannot make a silk purse out of a sow's ear.
猪耳朵做不成丝钱包；巧妇难为无米之炊。
'My key,' I shouted.
“钥匙！”我喊道。