look down

例句：

1. 1. She looked down at the ground as she walked.
   她走路时低头看着地面。
2. 2.The boy looked down at his shoes and noticed a small hole in them.
   男孩低头看着他的鞋子，发现里面有一个小洞。
3. 3. The teacher looked down at her students and smiled warmly.
   老师低头看着她的学生，温暖地笑了笑。