树根结构 structure tree: 结构树tree structure: 梳构; 树结构; 树型结构; 树形结构; 树枝结构; 树状结构armillaria root rot of tree: 树木根朽病bark of tree peony root: 牡丹皮chulan tree root: 珠兰根下载手机词典可随时随地查词查翻译