Notice that each tuning will not necessarily turn out a performance improvement.

注意，每次调优不一定会提高性能。

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The radio's dial twirled and the lights behind the tuning panel went out.

收音机的调谐钮转动了一下，面板上的指示灯熄灭了。

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The radio's dial twirled and the lights behind the tuning panel went out.

收音机的调谐钮转动了一下，面板上的指示灯熄灭了。

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