Collins Chinese Dictionary Plus (3rd edition), 2011:
一日千里 yī rì qiān lǐ at a tremendous pace
- 人类(類)在科学(學)技术(術)方面的进(進)步一日千(韆)里(裡)。 Rénlèi zài kēxué jìshù fāngmiàn de jìnbù yī rì qiān lǐ. Humanity has made tremendous progress in science and technology.