epicyclic motion的用法和樣例：
例句
- He most certainly deserves credit as a pioneer, with Le Verrier, of applying perturbation theory to planetary motion.
他與勒威耶都是應用微擾理論解決行星運動問題的開拓者，毫無疑問。 - These additional possibilities modify the gravitational force in a small but nonnegligible way, yielding potentially observable corrections to planetary motion.
這些額外的可能性，會以一種微小但不可忽略的方式修正重力，造成的結果有可能可以在行星運動中觀測到。
