The most ambitious programs have considered nearly three hundred gaseous molecular species.

最庞大的程序已经考虑了近三百种气体分子。

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A transport and delivery system for nanogram quantities of molecular species that does not use microfluidic channels, pumps, or valves is described.

本文介绍了一种不需要微流体通道、泵或瓣膜的纳克量分子运输和递药系统。

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That makes the tiger and snow leopard "sister species", the researchers report in the journal Molecular Phylogenetics and Evolution.

“这使老虎和雪豹成为了‘姐妹种’”，研究者在《分子系统学和进化》一刊中这样说。

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The team studied the "molecular clocks" of living species of fungi, plants and animals.

BBC: Earth AP

You would, therefore, have expected that macroscopic differences between species are reflected in differences between the molecular structure of these proteins, but this is not so.

ECONOMIST: Genetic science