冥王星

míng wáng xīng dà xiǎo hé yuè qiú chà bu duō

冥王星大小和月球差不多。

Pluto is comparable in size to the Moon.

tiān wén xué jiā zhī dào míng wáng xīng hé hǎi wèi yī yōng yǒu jī hū xiāng tóng de tǐ jī zhì liàng yǔ mì dù

天文学家知道冥王星和海卫一拥有几乎相同的体积、质量与密度。

Astronomers know that Pluto and Triton have nearly the same size, mass and density.