It would be irresponsible to expect the benign conditions of the past to return.

指望过去那些有利条件会重现的想法，是不负责任的。

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The clinical course of the disease is thought to be benign.

该疾病的临床过程中被认为是良性的。

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After tests the tumor was found to be benign.

检测发现肿瘤是良性的。

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After tests the tumor was found to be benign.

检测发现肿瘤是良性的。

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