To deceive oneself; to ignore an obvious truth while doing something wrong, thinking others won't notice; to bury one's head in the sand.
他以为只要不承认，大家就不知道他犯的错，这种做法简直是塞耳偷铃。
He thought that if he just didn't admit it, no one would know about his mistake; this approach is simply plugging his ears while stealing a bell.
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