a poplar tree with small rounded long-stalked leaves that tremble in the breeze 颤杨
Genus Populus, family Salicaceae: several species, in particular the European P. tremula and the North American quaking aspen (P. tremuloides) 杨属,杨柳科: 数种,尤指欧洲山杨和北美颤杨(拉丁名P.tremuloides)
语源
late Middle English : from dialect asp (in the same sense) + -en, forming anadjective later used as a noun (late 16th cent.)