It is pointed out, while expounding the principle of chopper speed variation, that the value of peak current can affect the service life of components and so it is necessary to control.

文章阐述了斩波调速原理，指出峰值电流的大小会影响元器件的寿命，所以有必要对瞬时电流的大小进行控制。

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As a value principle, virtue is the final and the motive force of elevating the principle and value of life.

德性作为一种价值原则，具有终极性，是提升生活原则和生活价值目标的内动力。

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From the communicating point of view, the study analyses the student social life, reflects and criticizes it under the social-life value principle of communication.

研究以交往作为分析学生社会生活的视角，并把交往视为社会生活的价值原则对之进行反思和批判。

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