I'd like to know the reason why you're so late.

我想知道你为什么迟到那么长时间。

《牛津词典》

That was the very reason why he felt a certain bitterness.

那正是他感到有点痛苦的原因。

《柯林斯英汉双解大词典》

There is no reason why love shouldn't cross the age barrier.

爱情没有理由不应跨越年龄障碍。

《柯林斯英汉双解大词典》

But Ms.Smith says the voter registration process may be one reason why young people are less likely to vote.

VOA: special.2010.10.28

The reason why literacy is required of everyone is because we don't live to 200.

为何每个人都需要文化素养？,因为我们活不到200岁,我们出于对外界的好奇。

麻省理工公开课 - 媒体、教育、市场课程节选

I think the reason why triathlon is not so, so big is just because it requires a lot of time.

我认为铁人三项运动之所以不够普及，
是因为它需要大量的时间。

对体育项目的热爱 - SpeakingMax英语口语达人

The third reason why U.S. Jewish leaders may be defending Obama's positions on Israel is because the Israeli left defends his position on Israel.

CENTERFORSECURITYPOLICY: US Jewish organizations and Obama

Their action of letting the NEI, nuclear lobbyists, gather and control the results of the Fukushima radiation found in the U.S. could be a reason why.

FORBES: Entergy Sues Feds Over Nuclear Waste

Peter Merrill, a principal at the accounting firm of PriceWaterhouseCoopers, argues that the shift to pass-through companies may be the single most important reason why U.S. corporate tax revenues are so low.

FORBES: Obama's Pandering To The Business Lobby And The Truth About Taxes