单词	back taper
释义	back taper noun : a slight relief on a tap or drill causing it to have a larger diameter at the point than at the shank Word History First Known Use 1941, in the meaning defined above
随便看	synergies synergise synergised synergises synergising synergism synergisms synergist synergistic synergistically synergists synergized synergizes synergizing synergy synes syneses synesis synesises synesthesia synesthesias synesthete synesthetes synesthetic synezeses

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