While aging is inevitable, scientists are finding out that certain changes in brain function may not be.

尽管衰老是不可避免的，科学家们却发现大脑功能的某些变化或许并非不可避免。

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No one knew, but it was certain and inevitable.

没有人知道，但那是必然的，无可避免的。

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As the suffering increased, a certain inevitable Schadenfreude set in.

随着痛苦的增加，“幸灾乐祸”不可避免地浮出水面。

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The bleeding problem, the doctors agreed, may be an inevitable result of treating certain kinds of lung tumors.

FORBES: Assessing Avastin's Risk

Tax reform promises to improve the opportunities of all while sponsoring less tax evasion, less distortion of investment priorities and less politically corrupting pursuit of loopholes, all of which are the certain and inevitable corollary of high tax rates enacted to salve inequality neuralgia.

WSJ: Jenkins: The Inequality Obsession

But a certain amount of abstruseness is inevitable, given the subject matter.

ECONOMIST: The question of existence