unnoticed
[ˌʌnˈnoʊtɪst]
adj.
未被觉察到的，未被注意到的;
不受人注意的，被忽视的;
没人理睬的;
例句:
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I tried to slip up the stairs unnoticed.
我试图趁没人注意溜上楼去。
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Do these examples go completely unnoticed by our politicians?
来自BBC
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As President, he affirmed that no tyranny went unnoticed.
他以总统的名义宣称没有对任何暴行置若罔闻。
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His kindness did not go unnoticed by his staff.
他的厚道员工了然于心。
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None of this has passed unnoticed by the leadership.
来自THETIMES
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Or is it going unnoticed by the general public?
来自BBC