Uracil -- a pyrimidine found in RNA that base-pares with adenine.

尿嘧啶--核糖核酸中的一种嘧啶，与腺嘌呤形成碱基对。

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The only difference is that in the RNA copy, thymine is replaced with the closely related base uracil, commonly abbreviated u.

唯一的区别在于，在RNA复制中，胸腺嘧啶被密切联系的、常被缩写为U的碱基尿嘧啶替换。

youdao

The only difference is that in the RNA copy, thymine is replaced with the closely related base uracil, commonly abbreviated u.

唯一的区别在于，在RNA复制中，胸腺嘧啶被密切联系的、常被缩写为U的碱基尿嘧啶替换。

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