deepens
v.
变深，加深( deepen的第三人称单数 );
加浓;
例句:
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A tragic breakdown of...standards, and the midnight of moral degeneration deepens.
来自M. L. King
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Wine deepens on aging.
酒久藏而变醇.
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" The sand - sea deepens with fathomless ice, And darkness masses its endless clouds ; "
瀚海 阑干百丈冰, 愁云黪淡万里凝.
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The mystery deepens , ie becomes harder to understand.
这奥秘更难理解了.
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So it's quite unsettling, and the mystery just deepens.
来自VOA
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But it deepens and becomes rather touching.
来自NEWYORKER