柯林斯詞典Neptune /?n?ptju?n/ 1. N the Roman god of the sea (古羅馬神話中的)海神尼普頓 (Greek counterpart Poseidon)Neptune /?n?ptju?n/ N 1. N the eighth planet from the sun, having eight satellites, the largest being Triton and Nereid, and a faint planar system of rings or ring fragments. Mean distance from sun: 4497 million km; period of revolution around sun: 164.8 years; period of rotation: 14 to 16 hours; diameter and mass: 4.0 and 17.2 times that of earth respectively 海王星 返回 Neptune劍橋詞典 Neptune noun (PLANET) the planet eighth in order of distance and farthest from the Sun, after Uranus 海王星 Neptune was discovered in 1846. 海王星是在1846年發(fā)現(xiàn)的。 返回 Neptune