graven.坟墓；死亡adj.严肃的；严重的；庄重的v.雕刻；铭记；grave humour严肃的幽默, 庄重的幽默grave object重大的异议, 严重缺点／障碍grave accentn.重音符grave robber盗墓者grave defect严重的缺欠, 大毛病, 严重缺点grave insult严重侮辱grave threat严重威胁grave period宽限期grave stroke重症脑卒中grave system墓葬制度