平动

The libration of the Moon allows us to see slightly more than half of its surface over time.
月球的 librations 使得我们随时间能看到其表面略多于一半的区域。
The slight libration in the Earth's axis causes the seasons to vary slightly each year.
地球轴的微小摇动导致季节每年有细微的变化。
The study of libration is crucial for understanding the geological features on the far side of the Moon.
研究 librations 对了解月球背面的地质特征至关重要。
The libration of a spinning top contributes to its stability by allowing it to correct small deviations.
旋转陀螺的 librations 有助于其通过纠正微小偏差来保持稳定。
In celestial mechanics, libration refers to the apparent oscillation of orbiting bodies due to changing viewing angles.
在天体力学中，libration 指的是由于观察角度变化而造成的轨道运行体的看似摆动。
The libration points in the Earth-Moon system are regions where satellites can maintain a stable orbit with minimal energy expenditure.
地球-月球系统中的 libration 点是卫星能以最小能量消耗维持稳定轨道的区域。
The slight libration of Jupiter's moons has helped scientists map their hidden surfaces.
木星卫星的微小 librations 帮助科学家绘制了它们隐藏的表面。
Libration in longitude allows astronomers to study Martian terrain that would otherwise be permanently obscured.
经度上的 librations 让天文学家得以研究那些否则将永远被遮挡的火星地形。
The libration of a binary star system reveals information about the masses and orbits of the stars involved.
双星系统的 librations 可揭示所涉恒星的质量和轨道信息。
The careful analysis of libration effects is essential for planning and executing space missions to celestial bodies.
仔细分析 librations 效应对于规划和执行对天体的太空任务至关重要。