droop

Without any water for a week, the flowers in the vase began to droop and turn brown.

(Chinese) 由于一周没浇水，花瓶里的花开始下垂并变黄。

His eyelids started to droop as he struggled to stay awake during the long lecture.

(Chinese) 当他在漫长的讲座中努力保持清醒时，他的眼皮开始下垂。