Let's consider four levels of a generic operation.

让我们考虑一个通用操作的四个步骤。

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"Operation" consists of three levels of feeling and experience, expression and appraising, adjusting and controlling.

“操作”是由感知和体验、表达和评价、调节和控制感情的三种能力组成。

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Serum levels of IMA were similar in both groups before operation(P > 0.05);

脑梗死组和对照组术前血清IMA水平无明显差异（P>0.05）。

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Serum levels of IMA were similar in both groups before operation(P > 0.05);

脑梗死组和对照组术前血清IMA水平无明显差异（P>0.05）。

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