We had to separate the young from the old.

我们得把年轻和老人分开。

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So we said goodbye, even before we had to separate inside.

这样我们道了别，即便在此之前我们就该在屋里分手的。

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In loco parentis meant that male and female college students usually had to live in separate buildings.

VOA: special.2009.07.09

Investment banking had to be a separate firm.

投资银行业务必须由独立公司承担。

耶鲁公开课 - 金融市场课程节选

The new schedule calls for Endeavour to lift off before dawn on Wednesday, the same day that NASA had hoped to launch a separate mission to survey the moon.

VOA: standard.2009.06.16

Lolesi sealed the points with a brilliant solo try on 70 minutes before referee Ashley Klein had to separate the players as fighting started again.

BBC: Huddersfield 26-22 Bradford

Many analysts had predicted that the Chinese portals, which had to separate their mainland content from the rest of their business in order to get Beijing's permission to list, would bomb in the new dotcom-unfriendly environment.

CNN: Playing the IPO Game

Very, very good writer and it was an ideal combination because she would write a play for me, I would do it, produce it with a chum and it would all be in the family and we never had to separate you see.

BBC: NEWS | Entertainment | Sir John Mills interviewed in 2002