基本解释[医药科学]维管束干英汉例句双语例句a tree with branches but no trunk looks more like a bundle of twigs fallen on the floor一颗没有树干但是有很多分支的树看起来更像是地板上的一捆树枝bundle trunk更多例句词组短语短语trunk atrioventricular bundle 释义房室束干trunk of bundle of his 希斯束干bundle trunk更多词组专业释义医药科学维管束干