A common danger causes common action.

同样的危险导致同样的行动。

youdao

Sensible people will draw together to face a common danger.

士将会同心协力面对共同的危险。

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While common perception of a common danger was what made the new relationship possible at that time, it was not the dominant reason for seeking a new relationship.

尽管当时对共同危险的共同察觉使得这种新关系变得可能，但它不是寻求新关系的主要原因。

youdao

They threaten the common security of all nations. A nuclear weapon in the hands of terrorists is a danger to people everywhere, from Moscow to New York to South Asia."

VOA: standard.2010.04.11

They fight and claw, unaware they are speeding towards a precipice, oblivious to the common danger that makes their differences pale.

CNN: Obama leads Democrats out on a limb

Not realizing that the room-temperature water is beginning to dangerously bubble around you is a common danger for many registered persons, as shown here.

FORBES: Till Death Do Us Part Stumps Stockbroker

Arabs and Jews see a common danger...

CENTERFORSECURITYPOLICY: Opportunity is knocking on Israel's door