Ksu
abbr. key service unit 密钥业务单元
🗣️ 情景例句
Sorry to keep after you, but could you tell me...
对不起，又打扰你了，你能告诉我…
Soon learnt,soon forgotten.
学得快，忘得快。
I don't care where we go as long as we don't have to stand in line.
不管去哪里，只要不用站着排队就行。