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汉语拼音：zhèng shí

1.推历明时，使四时不失序，寒暑不失常，时事不悖乱。

1. 推历明时，使四时不失序，寒暑不失常，时事不悖乱。

   《左传·文公元年》：“先王之正时也，履端於始，举正於中，归餘於终。” 杜预 注：“步历之始，以为术之端首。期之日，三百六十有六日，日月之行又有迟速，而必分为十二月，举中气以正。月有餘日，则归之於终，积而为闰，故言归餘於中。” 晋 葛洪 《抱朴子·对俗》：“ 金天 据九鴈以正时。”《晋书·律历志下》：“以昔在 唐帝 ，协日正时，允釐百工，咸熙庶绩也。”《新唐书·刘蕡传》：“君以知人为明，臣以正时为忠。”

• The news headlines are broadcast on the half hour.

  新闻提要每到半小时正时作一次广播.

• Oil may be forced out through the timing cover and rear - main bearing oil seals.

  机油会从正时齿轮盖和后主轴承油封处压出.

• Do not attempt to modify this fork to attain ignition timing.

  决不要试图变更阀叉以获得点火正时.

• Replace the oil seal in the timing case cover.

  更换在正时箱盖中的油封.

• As this dream is modified through legitimately ascending humans, all shall change.

  当这一梦想被真正提升的人类所修正时, 一切都将改变.

• Remove the special gear puller and adapter tools from timing gear cover.

  从正时齿轮罩上拆卸专用齿轮拉拔器及接头工具.

• This design introduces the automobile engine blocks by powder metallurgy technic.

  此次设计介绍的是用粉末冶金法制取汽车发动机正时销座的过程.

• During cranking timing depends on cranking speed and temperature.

  在启动期间,点火正时取决于曲轴转速和发动机的温度.

• Install the timing chain tensioner.

  安装正时链调整器.

• Ignition timing must advance as rpm increases.

  随著引擎转速的增加,点火正时必须提前.

• A : Check the ignition timing.

  检查电子点火器正时.

• Incorrect injection pump timing.

  1不正确的喷射泵正时.

• Inspect timing chain for wear.

  检视正时链有无磨损.

• Experiments with 6105 QA diesel engine gear cover have shown that the method is effective.

  对6105QA柴油机正时齿轮罩盖的实验表明了其正确性.

• The designed VVT ( variable valve timing ) system can change the valve timing in running condition.

  开发了变进排气正时 控制机构,实现气门正时的调节.