Tree-trunk lacquer涂干法
tree-trunk树干;主干
tree-trunk injection树干注射
the diameter of a tree-trunk树干的直径
green tree trunk生树干
TREE TRUNK IN SKETCH树干写生
analysis on tree trunk树干解析
parárubremainr tree trunk橡胶树皮
tree trunk curvature树干曲率
N-COUNT（可数名词） A tree trunk is the wide central part of a tree, from which the branches grow. 树干