基本解釋adj.[植](葉脈等)到頂?shù)?/li>同根派生 percurrent相關(guān)詞英漢例句Secondary veins are semicraspedodromous and form marginal loops, tertiary veins are percurrent, quaternary veins form orthogonal or polygonal areoles filled up by branched and freely ended veinlets. 二級脈在葉緣內(nèi)分支，相互連接形成脈環(huán)，三級脈及頂型，脈間區(qū)內(nèi)充滿分支的自由結(jié)束的小細脈。major veins impressed, rarely flat adaxially, lateral veins 7-10 pairs, tertiary venation weakly percurrent. 主脈凹陷，正麪很少平，側(cè)脈7-10對，支脈弱頂。percurrent proliferation 及頂增殖percurrent更多例句