英語翻譯：

know well

例句：

1. 他不懂事，他不諳世故。
   He was ignorant of the world.
2. 他有文學愛好，也熟諳科學。
   He had a literary taste and was well read in science.
3. 只有律師是不會因不諳法律而受到懲罰的人們。
   Lawyer is the only person in whom ignorance of the law is not punished.