perihelion怎么读,perihelion的音标和真人发音
英音  [ˌperɪ'hi:lɪən]    
美音 [ˌperɪ'hi:lɪrn]    

perihelion是什么意思,perihelion的意思是

n.近日点

perihelion 的用法和双语例句“点击”或“选中”例句中的单词,就可以看到词义解释

How much does the direction of perihelion change each orbit ?
近日点方向使每个轨道改变了多少?
According to marsden 's calculations , this comet reaches its closest point to the sun ( perihelion ) on march 18th .
根据marsden的计算,这颗彗星会在3月18日过近日点。
Although predicting the brightness of comets with any degree of accuracy is very difficult , hale-bopp met or exceeded most predictions when it passed perihelion on april 1 , 1997 . The comet was dubbed the great comet of 1997 .
虽然预测彗星在不同角度的亮度是非常困难的,但是当1997年4月1日海尔波普彗星通过近日点时,达到甚至超过了大多数的预测。