Having maintained her popularity at home in Alaska, why would she quit now? There are several possibilities.

在家乡阿拉斯加名声颇佳的佩林，为什么现在宣布退出呢？

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Just the Namib Desert, said to be the oldest on Earth, having maintained at least semi-arid conditions for anywhere between 55 and 80 million years.

只有纳米布沙漠，据说是地球上最古老的沙漠，这儿处处保持至少半干旱的条件已有5500万到8000万年。

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It also means having private space dedicated to work: the space must be heated, cleaned, maintained and paid for.

这也意味着要有专门用来工作的私人空间：要考虑到这个办公空间的供暖、清洁、维护和所需费用。

youdao

With some justice, Mr Turabi can claim credit for having maintained this veil of civility in a traumatised society.

ECONOMIST: Sudan: Palace coup | The

The seven-time Tour de France winner asked the court for action against the USADA for a host of reasons, having maintained he's never tested positive for performance-enhancing drugs and accusing the USADA and its CEO, Travis Tygart, of being out to get a "big fish" to justify the agency's existence.

CNN: August 21, 2012 -- Updated 0154 GMT (0954 HKT)

The Seagair, built in 1985, was described by the brokers as having been "maintained in excellent condition" and "in great condition for her age".

BBC: Ona Mary Unwin