Carefully she covers them and lumbers away.

它把這些卵仔細地蓋好,然后慢吞吞地走開了.

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Research shows that the intrinsic frequency of hole defect lumbers is little lower than standard lumbers.

研究表明,含有孔洞試件的固有頻率與標準試件相比略低一些,但差別不大.

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