lǎo shī / mù zhǐ / hēi bǎn / shàng / de / zhòng diǎn / tí xǐng / xué shēng / rèn zhēn / jì lù

老师目指黑板上的重点，提醒学生认真记录。

The teacher indicated the key points on the blackboard with his eyes and reminded the students to take careful notes.