orbital cycles的用法和樣例：
例句
- The earth's orbital cycles were driving a simultaneous natural cooling trend, especially at high northern latitudes.
地球軌道周期正在造成自然的冷卻趨勢，尤以北方高緯度地區為最。 - With Callisto's orbital period of about half a month, the entire sequence could take less than a year.
由于木衛四繞木星公轉的軌道周期約為半個(gè)月，整個(gè)過(guò)程只需不到一年。
