選擇子樹select: vt. 選;選擇;挑選;選拔。 Her father l ...subtree: 樹狀子目錄; 子樹display subtree: 顯示子樹empty subtree: 空子樹identical subtree: 相同子樹下載手機(jī)詞典可隨時隨地查詞查翻譯