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| 1. | Another characteristic of sun-earth system is the gradual precession of the equinoxes and solstices along |
| 日地系统的另一个特点是二分点和二至点沿轨道逐渐运动。 |
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| 2. | Another characteristic of the sun-earth system is the gradual procession of the equinoxes and solstices along |
| 日-地系统的另一特点是二分点和二至点沿轨道逐渐前行。 |
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| 3. | Apropos, the bucket is heard to have flown to the outer space and is now a satellite, moving along the |
| 至于那个水桶，据说它飞出外太空之后变成人造卫星，现在正绕著地球轨道行进中。 |
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