These contradictory versions arise because rulers and clocks—the things that mark time and space—are not the same for different observers.

之所以有这样矛盾的观点，这是因为“标尺”和“时钟”——它们标志着事件所在的时间和空间，它们对于不同的观察者来说是不一样的。

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Their departure leaves three space station residents, as well as Endeavour's six-man crew commanded by Mark Kelly, husband of wound Rep. Gabrielle Giffords.

他们离开了，留下了三个空间站居民，以及由马克·凯利（受伤众议员加布里埃尔·吉福兹的丈夫）指挥的奋进号的六名成员。

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Then, use a simple system of symbols to mark off 4 different information types in the column space left in the margin.

然后，在你的第一列空栏中使用不同4符号为4不同的信息类型做标记。

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Seemingly without breaking sweat, Spurs' second goal arrived on the half-hour mark when Jenas found Keane in space on the left-hand side of the area and he ran on to slot home past the on-rushing goalkeeper.

BBC: Robbie Keane scores Tottenham's second goal

Microsoft recently launched Office 365, a web-based productivity software product, to mark an entry into the fast-growing cloud-computing space.

FORBES: Microsoft Stock Has Upside To $28 But Office Franchise Is A Drag

Phillips could have scored soon after the half-hour mark when, having cleverly engineered space, he shot inches wide.

BBC: fa-cup