tiān​wén​dān​wèi

astronomical unit

天文单位 天文單位 tiān​wén​dān​wèi
astronomical unit noun
astronomical unit (AU); a unit of distance used in astronomy equal to the average distance between the Earth and the Sun, approximately 150 million kilometers

Frequency

Written text
0.036 per million

Sources

Frequency data
BCC Corpus (BLCU)