Uracil -- a pyrimidine found in RNA that base - pares with adenine.
尿嘧啶 -- 核糖核酸中的一種嘧啶,與腺嘌呤形成堿基對(duì).
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The missile control system composed of two pares, the controller and the controlled object.
粗略地看,導(dǎo)彈控制系統(tǒng)都是由控制器和被控對(duì)象兩大部分組成的.
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