常見(jiàn)例句雙語(yǔ)例句Mercury – the solar system's innermost planet – is at its greatest eastern elongation today.水星——太陽(yáng)系最里面的行星—今天是東部最大的延伸。At greatest eastern elongation, Mercury swings farthest east of the sun, and briefly appears as an evening "star" after sunset.這是水星是最大程度的在太陽(yáng)東部的延伸，這是今晚日落后最簡(jiǎn)短的一次顯示。Don't tarry when looking for Mercury. Even at its greatest eastern elongation, Mercury sets less than 1.5 hours after the sun tonight.在尋找水星的時(shí)候，無(wú)須駐足等候。即便處在東大距，日落之后不到1個(gè)半小時(shí)，水星便下沉了。 返回 elongation greatest eastern