ruminating

英 [ˈruːmɪneɪtɪŋ]

美 [ˈruːmɪneɪtɪŋ]

v. 沉思; 认真思考
ruminate的现在分词

柯林斯词典

VERB 沉思;琢磨;认真考虑
If youruminate onsomething, you think about it very carefully.
1. He ruminated on the terrible wastage that typified American life...
  他认真地考虑了美国生活中典型的严重浪费问题。
2. Obsessional personalities commonly ruminate excessively about death.
  有强迫症的人通常过多地思考死亡的问题。
VERB （动物）反刍
When animalsruminate, they bring food back from their stomach into their mouth and chew it again.
1. He wanted to have a look at the two oxen, both ruminating without raising their eyes.
  他想看看那两头牛，它们都在反刍，眼睛都不抬一下。