| 1. | 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。 |
| 2. | A person who lives at the equator is in accelerated motion due to the earth's rotation .
一个居住在赤道的人由于地球自转的缘故是作着加速运动的。 |
| 3. | A few decades ago it was discovered that the rotational velocity of the earth undergoes small variations .
几十年前，人们发现地球自转的速度有微小的变化。 |
| 4. | The tilt of the earth's axis, not the shape of its orbit, is what is responsible for the seasons .
形成季节的主要因素不是地球公转轨道的形状，而是地球自转轴的倾斜。 |
| 5. | The centrifugal force caused by the earth's rotation decreases from a maximum at the equator to zero at the poles .
地球自转产生的离心力从赤道的最大值降低到极地的零值。 |
| 6. | Radiation of solar particle and nontidal acceleration of earth
太阳粒子辐射与地球自转非潮汐加速度 |
| 7. | Iers , international earth rotation
国际地球自转服务 |
| 8. | Earth rotation parameter
地球自转参数 |
| 9. | Earth ' s spin vector
地球自转矢量 |
| 10. | Leap seconds are needed because the earth ' s spin is slowing down , gradually and unevenly
润秒之所以必要，是因为地球自转逐渐以不规则的速度减缓。 |
