詞語：librations
librations的解釋
librations[lai'breiʃən]n. 振動（形容詞librational）；天平動
librations的意思
librations 天平動;librations inlatitude 緯秤動;librations of moon 月視振動;librations in longitude 經秤動;
librations的參考例句
1.Four-pole with double distance, non-librations, speed can be adjusted unlimited. 四導柱雙行程升降、無振動，進出速度無級調節。
2.Compared stress and librations distortion of the first frequency and gained better beam. 通過結構的變形和一階頻率的振型研究比較，初步確定了較為合理的橫樑結構。
3.Librations are primarily caused by the Moon's varying orbital speed due to the eccentricity of its orbit: this allows us to see up to about 6° more along its perimeter. 振動主要地由月亮所引起正在由於它的軌道的古怪改變軌道的速度：這讓我們沿著它的周長見到達大約6°更多。