perihelion
音标发音
- 英式音标 [ˌper.ɪˈhiː.li.ən]
- 美式音标 [-ə]
基本解释
- n.近日点；最高点
同根派生
英汉例句
- A comet is at perihelion when it is closest to the sun.
彗星最接近太阳时，它就是在近日点。 - The anomalistic year is the time between successive transits of the Earth through the perihelion.
近点年是地球连续两次通过近日点之间的时间。
用作名词 (n.)
英英字典
- the point in an object's orbit (= a curved path in space around a planet or star) around the sun at which the object is closest to the sun