If you fail you will not be given a second chance.

(idiomatic) Something non-existent; something of no value or cost.

(baseball) To hit a fair ball so well that the ball flies over all of the spectators' seats and lands outside the stadium. / (idiomatic, by extension) To produce a spectacular achievement.

To express an emotion, belief, or stance overtly and make it an important part of one's public life.

(idiomatic) To be empowered to choose whatever job, financial arrangement, or course of action one desires.

(idiomatic) Alternative spelling of mind one's p's and q's

Slogan for the reunification of China as one country, but with areas like Hong Kong and Taiwan with separate economic and political systems.

(computing, informal) The rule that a database, a user interface, etc. should allow for either zero, one, or an indefinite number of an entity.

(informal, sarcastic) It is highly doubtful: indicating that something is not likely to happen to the person specified.

(idiomatic) To be grateful, feel oneself fortunate.