Biconditional
[計] 雙條件的, 雙態的
??? 情景例句
Yes. I have a room booked with you, for three days starting today. Name of Lu, L-U.
是的，我已向你們訂了房間，從今天開始，共三天。姓陸，L-U。
A close mouth catches no flies.
病從口入，禍從口出。
That fits the puzzle! It must be him!
這符合謎底，肯定是他。