A handful of Africa's unique island mammal families that were present 26 million years ago are absent from sites younger than Mush.

在比 Mush 更年轻的遗址中，不少2600万年前只属于非洲大陆的哺乳科动物消失了。

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If the baseline file is not present at reporting time, the classes that were not loaded will be absent from the report.

如果基线文件没有在报告时出现，那么没有载入的类将不会出现在报告中。

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Sorting strings where some items are present but have zero length and some are absent

排序字符串，一些项存在但长度为零，一些不见了

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In President Obama's and Romney's cases, fathers -- present or absent -- are a large part of that cloth.

CNN: STORY HIGHLIGHTS

The positive spin: Most experts, myself included, agree that it's better for a child to have an absent parent than a parent who's present but neglectful -- or worse.

CNN: Why there are more walk-away moms

The twin rule of pathology states that any heritable disease will be more concordant (that is, more likely to be jointly present or absent) in identical twins than in non-identical twins and, in turn, will be more concordant in non-identical twins than in non-siblings.

ECONOMIST: Twin studies, genetics and the environment