lumber,timber区别?

lumber,timber区别? 请问timber,lumber和wood都是"木材,木料",有何区别? now timber smurf has some animal friends in his lumber yard蓝 Kempas Sawn Timber 和tropical 与强化地板的区别. log 和timber这2个词有什么区别呀 we need more lumber core timber Timber-Pitbull(Ke$ha) 这首歌中的 "Timber" timber翻译成中文 get some sturdy timber timber iand是什么意思 rotten timber是什么意思