noun 下载 🔗分享 周转，摆动 The act of librating. Examples : "The child's librations of his arms and legs helped him to calm down. " 孩子手臂和腿脚的来回摆动帮助他平静了下来。 astronomy physics 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 月球天平动，周动 The apparent wobble or variation in the visible side of the Moon that permanently faces the Earth, allowing observers on Earth to see, over a period of time, slightly more than half of the lunar surface. Examples : "The moon's librations allow us to see a little bit more of its surface over time, as it appears to wobble slightly in the sky. " 月球的天平动让我们随着时间的推移能看到略微多一点的月球表面，因为它看起来在天空中会轻微地晃动。 astronomy space science phenomena 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 天平动，视动，摇动 (by extension) A similar rotational or orbital characteristic of some other celestial body. Examples : "The Earth's librations affect the timing of our sunrise, and similarly, the moon's librations cause us to see slightly different portions of its surface from Earth. " 地球的视动影响着我们看到日出的时间，同样地，月球的视动也使得我们在地球上能看到月球表面略有不同的区域。 astronomy physics space 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 微振，摆动。 A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion. Examples : "The scientist observed the librations of the small molecule, noting its slight back-and-forth rotational movement under the microscope. " 科学家在显微镜下观察到这个小分子的微振现象，并记录了它轻微的前后摆动。 physics astronomy technical chemistry 与AI对话词汇游戏阅读练习
