When two tigers fight, one is sure to lose.

两虎相争，必有一伤。

《新英汉大辞典》

Real friendship is when two individuals share the same soul.

真正的友谊是两个人共享同一个灵魂。

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When two objects in space collide, thetwo objects break into many smaller pieces.

当两个物体在太空中相撞时，这两个物体会分裂成更小的碎片

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The outcome of the Saturday night drama had actually been sealed earlier in the day, when two Democratic senators who had not pledged their support for the bill announced that they would vote for it to advance to debate.

VOA: standard.2009.11.23

How did they determine when two armies would charge each other?

他们如何确定双方何时开始进攻

耶鲁公开课 - 古希腊历史简介课程节选

I agree involves saying "Yes" to something. It's when two people think alike.

agree 表示同意某事。一般用在两个人想法一致的时候。

I agree课堂 - SpeakingMax英语口语达人

They're small and flimsy even when two of the discs are welded together at the edges.

BBC: Sticking solar power station where the Sun shines

Twenty-five people, including a driver and several schoolchildren, were hurt when two buses crashed in Salford.

BBC: Schoolchildren hurt as two buses crash in Salford

When two name brands get together in fast food, the result is often a mess.

FORBES: At Last, a Great Co-Branded Store: Dairy Queen + Orange Julius