现在的失败能严重地毁掉他将来的机会。

Failure now could fatally damage his chances in the future.

《柯林斯英汉双解大词典》

要是他们将来在生活中遇到一扇隐喻的门，比如某个机会的到来，会怎么样呢？他们是不是不会打开门并抓住机会，而是凝视着它，想知道“假如它不是一扇门，将会怎么样？”

What if later in life they come to a metaphorical door, like an opportunity of some sort, and instead of opening the door and taking the opportunity, they just stare at it and wonder, "What if it isn't a door?"

youdao

对失去这么好的一次机会你将来总有一天会后悔的。

You will live to rue the loss of such a good opportunity.

youdao