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VERB
给…蒙上阴影；使扫兴
If an unpleasant event or feeling overshadows something, it makes it less happy or enjoyable.
例句
Fears for the President's safety could overshadow his peace-making mission...
对总统安全的担忧可能会给他的调解使命蒙上阴影。
Her childhood was overshadowed by her mother's incarceration in a psychiatric hospital.
她的母亲被关在精神病院，这给她的童年蒙上了阴影。
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VERB
使黯然失色；使相形见绌；使显得无足轻重
If you are overshadowed by a person or thing, you are less successful, important, or impressive than they are.
例句
Hester is overshadowed by her younger and more attractive sister.
赫斯特在她那年轻而且姿色更胜一筹的妹妹面前黯然失色。
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VERB
（楼房、树木、大型建筑物等）遮蔽，遮挡
If one building, tree, or large structure overshadows another, it stands near it, is much taller than it, and casts a shadow over it.
例句
He also designed one of the Edinburgh University towers that overshadows George Square...
他还设计了爱丁堡大学一座投影于乔治广场的塔楼。
She said stations should be in the open, near housing, not overshadowed by trees or walls.
她说车站应该建在住宅区附近的开阔地带，而不应为树木或墙壁所遮挡。