There must be a reason why Xenicibis had such strange wings.

始祖鸟拥有如此奇怪的翅膀一定事出有因。

youdao

You see there must be a reason why the person has achieved success.

为什么?你觉得那人成功肯定是有原因的。

youdao

Jack remains at the abandoned field because he knows there must be a reason why the power is going to be turned off.

杰克想留在荒芜的旷野中，因为他觉得，将这个地段的电力切断肯定是有原因的。

youdao

There must be a compelling reason why they should hire you to manage and implement it, as opposed to using a current employee.

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There must, however, be a reason why hiccuping persists 370 million years after animals started hauling themselves onto the land.

BBC: Why we hiccup

All the more reason why the Redskins must be cautious in bringing him back from a right knee injury sustained December 9th against the Baltimore Ravens.

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