He has stayed with us so long he seems to have become a permanent fixture.

他在我们这里待了很久，好像成了我们的固定成员。

《牛津词典》

Since the roads are very bad, the trip took us a long time.

由于道路很差，这次旅程花费了我们很长时间。

《柯林斯英汉双解大词典》

It has set us back in so many respects that I'm not sure how long it will take for us to catch up.

我们在很多方面都被延误了，不知道需要多久才能赶上。

《柯林斯英汉双解大词典》

"By twenty twenty-five, we expect new spacecraft designed for long journeys to allow us to begin the first-ever crewed missions beyond the moon into deep space.

VOA: special.2011.07.18

But the reason is ultimately, Mill claims, a utilitarian reason once you consider the long-run interests of humankind, of all of us as progressive beings.

但穆勒称，这个原因根本上还是功利的,当你考虑到人类，长远发展的利益。

耶鲁公开课 - 公正课程节选

"It doesn't mean we don't have problem. The fact is,we didn't need a rating agency to tell us that we need a balanced, long-term approach to deficit reduction.

VOA: special.2011.08.12

This ETF, like TMF, has gained from its leveraged exposure to long-term US Treasuries.

FORBES: 6 ETFs On Fire

Rising crude oil production in Texas and North Dakota has contributed to a reversal of the long-term US production decline.

FORBES: The Most Important Energy Developments Of 2012

That is is one reason why the dollar has been going up today, and so have long-term US interest rates, to the highest level in nearly a year.

BBC: The US in 2013: Economics trumps politics?