vt.& vi.砍伐（lumber的第三人称单数形式）...

Carefully she covers them and lumbers away.它把这些卵仔细地盖好,然后慢吞吞地走开了.Research shows that the intrinsic frequency of hole defect lumbers is little lower than standard lumbers.研究表明,含有孔洞试件的固有频率与标准试件相比略低一些,但差别不大....

lumbers的音标：...