English translation of '沉思'

动

1. ponder
   ⇒ 他为此事沉思了很久。 (Tā wèi cǐ shì chénsīle hěn jiǔ.) He pondered this matter for a long time.
   ⇒ 他陷入了沉思。 (Tā xiànrùle chénsī.) He was lost in thought.