1. 对…进行微调;细调
    If you fine-tune something, you make very small and precise changes to it in order to make it as successful or effective as it possibly can be.

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    e.g. We do not try to fine-tune the economy on the basis of short-term predictions...
           我们不会根据短期预测就试图对经济进行微调。
    e.g. Computers allow the plans to be fine-tuned and to be altered quickly.
           计算机使得这些图样能够得到细调，并且可以迅速更改。

1. make fine adjustments or divide into marked intervals for optimal measuring

    e.g. calibrate an instrument
           graduate a cylinder

    Synonym: calibrategraduate

2. adjust finely

    e.g. fine-tune the engine

    Synonym: tweak

3. improve or perfect by pruning or polishing

    e.g. refine one''s style of writing

    Synonym: polishrefinedown