optical nutation的用法和樣例：
例句
- A parameter design method of nutation cross-feedback control is investigated.
研究了章動交叉反饋校正的參數設計方法。 - Our model of the non-rigid Earth nutation and related works are introduced, and the trend and the prior research fields of this research work are also discussed.
重點介紹了包含海洋和大氣的非剛體地球章動模型和有關研究工作，並對將來的發展方向作了討論。
