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汉语拼音：zì zhuàn

天体绕着自己的轴心而转动。地球自转一周的时间是一昼夜；月亮自转一周的时间约为农历一个月。

1. 自行转动。

   《后汉书·张衡传》：“参轮可使自转，木雕犹能独飞。” 南朝 梁 刘勰 《文心雕龙·定势》：“圆者规体，其势也自转；方者矩形，其势也自安；文章体势，如斯而已。”

2. 天文学名词。凡行星绕着自己的轴心转动，谓之自转。地球自转一周的时间是23小时56分4秒；月亮自转一周的时间跟它绕地球公转一周的时间相同，都是27天7小时43分11.5秒。

• the diurnal rotation of the earth

  地球的周日自转

• the daily rotation of the earth on its axis

  地球每天的自转

• The earth revolves both round the sun and on its own axis.

  地球既公转又自转.

• The earth rotates on its axis once every 24 hours.

  地球每24小时依其轴心自转一次.

• The earth whirls on its axis.

  地球绕轴自转.

• The South and North Pole are the two points at opposite ends of the earth, about which it revolves.

  南北极是地球绕之自转的两个相对的点.

• The Earth spins on its own axis.

  地球绕着地轴自转。

• In addition, spin - bearing life is sharply reduced at higher operating speeds.

  此外,在较高的运行速率时, 自转轴承的寿命急剧下降.

• The revolution of the earth causes day and night.

  地球的自转形成白天和夜晚.

• The sun appears to rise and set because of the earth's rotation.

  因为地球在自转,看上去就有了日出和日落.

• Venus has the distinction of spinning " backward " on its axis.

  金星具有沿主轴反向自转的特性.

• Another kind of period variation, " Glitches, " are seen in several pulsars.

  在几个脉冲星中还看到了周期的另一种变化, 即 “ 自转突快 ” 现象.

• The spin phenomenon exists only in quantum theory.

  只有在量子理论中才出现这样的自转效应.

• Soon this frenzied rotation slows down.

  不久,这种疯狂的自转便减慢了.

• The earth's rotation and its motion around the sun add an appreciable frequency shift.

  地球自转与地球绕日公转产生附加的频移.