MicroRNAs, first observed a few years ago in roundworms, are short noncoding RNAs that fold back on themselves, like hairpins.是什么意思_MicroRNAs, first observed a few years ago in roundworms, are short noncoding RNAs that fold back on themselves, like hairpins.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句