| 释义 | 
             
                Precursor,RNA
                
            precursoryadj. 预备的, 初步的 先兆的precursorn. 先驱;先行者;先兆,前兆 初期形式procrastinatevi. 拖延,耽搁
 前导qián dǎo 
 bellwether, precursor先导xiān dǎo 
 forerunner, precursor先进者xiān jìn zhě 
 precursor先驱者xiān qū zhě 
 outrunner, precursor, trailblazer先驱xiān qū 
 pioneer; herald; forerunner; avant-courier; precursor淀粉样蛋白前体diàn fěn yàng dàn bái qián tǐ 
 amyloid protein precursor
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