noun 下载 🔗分享 千米,公里 (official BIPM spelling, Australian, New Zealand, Irish, Indian and South African spelling) An SI unit of length equal to 103 metres. Symbol: km Examples : "The school is about one kilometre from my house. " 学校离我家大约一公里。 unit math science 与AI对话词汇游戏阅读练习