| 释义 |
DEFINITIVE EXAMPLES 权威例句〔radius vector〕Astronomy A straight line connecting the center of the sun or another body with the center of a planet, comet, or another body orbiting around it.【天文学】 动径;向径:连接太阳或其它天体的中心与绕其运行的行星、慧星或其它天体的直线美国传统There will not be an opportunity to see the comet again, even in the lifetime of the youngest of us.哪怕是对我们中最年轻的来讲,一生中也将不会有机会能再看到这颗慧星了。剑桥国际 |