perihelion
英[ˌperɪ\'hi:lɪən]
美[ˌperɪ\'hilɪrn]
基本释义
- n.
- 近日点
词性变化
- 复数:perihelia;
实用例句
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 ?
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英英释义
Noun
1. periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun