percurrent

常见例句

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.
二級脈在葉緣內分支，相互連接形成脈環，三級脈及頂型，脈間區內充滿分支的自由結束的小細脈。
major veins impressed, rarely flat adaxially, lateral veins 7-10 pairs, tertiary venation weakly percurrent.
主脈凹陷，正麪很少平，側脈7-10對，支脈弱頂。
percurrent proliferation
及頂增殖