英文諺語 It takes two to tango
It takes two to tango 孤掌難鳴；一個巴掌拍不響
The active cooperation of both parties is needed for some enterprises. Said when you want to emphasize that both people involved in a difficult situation must accept the blame, or that an activity needs two people who are willing to take part for it to happen.
“It takes two to tango” is a very common expression in America. Specifically, it means that a man and woman should have equal interest in each other to make a relationship work.
“We’ll never pass this bill unless both parties work out a compromise – it takes two to tango.”