多虫的源代码发行版确实存在，这就是之所以在手头保留较旧源代码(以及任何安装步骤)是个好主意的原因，以防较新的源代码不正常。

Buggy source releases do happen, and that's why it's a great idea to keep your older sources (and any installation steps) handy in case the newer sources aren't up to snuff.

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冰河时期海洋中多空虫贝壳化石中积聚的较重的氧同位素比较多，而另一种轻的氧同位素则更多地积聚在古代冰层和积雪中。

During glacial periods, the forams' shells contain more of the heavier of two oxygen isotopes, as the lighter one is preferentially accumulated in snow and ice rather than the ocean.

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200多万年前的马蹄蟹化石，与今天的马蹄蟹几乎完全相同：它们是三叶虫最近的亲戚。

Horseshoe crab fossils over 200 million years old are almost identical to contemporary animals: They are the closest living relatives of the trilobites.

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