aspen
/ˈæspən/noun
1- a poplar tree with small rounded long-stalked leaves that tremble in the breeze颤杨。
1.1
- 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）。
词源
late Middle English: from dialect asp (in the same sense) +-EN2， forming an adjective later used as a noun （late 16th cent.）.