The chemical structures that form the units of DNA and RNA and that encode genetic information i.e. the bases that make up the base-pairs are A, G, T, C and U (see DNA).

形成DNA、RNA单体以及编码遗传信息的化学结构，也就是组成碱基对的碱基包括A、G、T、C、U。

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Detention pond and retention pond are rainwater control structures used in almost every new development project in u.

滞留池和储水池作为雨水控制结构，几乎用于美国的每一个新建项目中。

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The first and second-stage larvae were characterized by their abruptly thinned tail ends and the third-stage larvae were characterized by a pair of inverted U-like structures of the head.

第一、二期幼虫的特征为尾尖骤然尖细，第三期幼虫的特征为头部具一对倒“U”形棕色结构。

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First, distance and force structures inhibit the U.S. from making any immediate moves against Kim's regime.

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Furthermore, in 1986, the U.S. had one of the lowest effective marginal corporate tax rates for equity-financed investments in machinery and industrial structures in the U.S., and now we have one of the highest.

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For Japan this means an unwinding of the structures and alignments of the current U.S.-Japan security relationship.

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