Pki
abbr. Public Key Infrastructure 公鑰基礎設施
??? 情景例句
By the way, will we be able to get a refund on this cancellation?
順便問一下，我們取消后可拿回定金嗎？
A new bicycle is out of the question - we can't afford it.
買新自行車的事談不上 —— 我們買不起。
No, they aren't. They're their books.
不，不是我的。這些是他們的書。