今夜无人入眠

Missing, extremely new, or very obvious to obtain.

Nessun dorma (Let no one sleep) is an aria from the final act of Giacomo Puccini's opera Turandot and one of the best-known tenor arias in all opera. It is sung by Calaf, a man who falls in love at first sight with Princess Turandot. Any man who wishes to wed the princess must first answer her three riddles; if one fails, he will be beheaded. In the aria, Calaf expresses his assurance that he will win Turandot.