开小差 (kāi xiǎochāi) Be absent-minded (Intermediate)
开小差 (kāi xiǎochāi) Be absent-minded
The character “开 (kāi)” means open; “小 (xiǎo)” means small or little and “差
(chāi)” means errand or job. Example: Tā yèlǐ méi shuì hǎo, báitiān shàngkè shí sīxiǎng zǒng kāi xiǎochāi. 他夜里没睡好, 白天上课时思想总开小差。
He can’t sleep well at night …