treeon Basic wordsalso onCEFR Beginners (A1)? Band 1 (BND1)? 木料,树,树状图 treeless treeless(adjective) 无树木的 trees trees(noun) [化学] 树状结构(tree的复数),[植] 乔木,树木 tree tree(noun) 木料,树,树状图 Forms adjectivenoun treeless trees tree