不约而同 [- yuē ér tónɡ]do or think the same without prior consulation; act in concert without previous arrangement; agree undesignedly; agree [fit] without precious consultation; an undesigned coincidence; be in agreement without prior discussion; do the same thing without previous arrangement; fall precisely together with; happen to coincide; simuitaneously; take the same action or view without prior consultation; tally by coincidence [chance; accident]; with one accord:•¶ 她一讲完， 大家不约而同都鼓起掌来。 Spontaneous applause broke out as soon as she finished speaking.
•¶ 他俩不约而同地走出房间去享受那温暖的阳光。 Of one accord, they went out of their room to enjoy the warmth of the sun.
•¶ 他们都不约而同地提出了这个问题。 They all raised the question as if by prior agreement.