plead ignorance

例句：

1. 1. I pleaded ignorance of the details to avoid causing any trouble.
   我恳求无知，以避免造成任何麻烦。
2. 2. The lawyer pleaded ignorance of the law to save his client's life.
   律师恳求无知，以拯救他的当事人的生命。
3. 3. The teacher pleaded ignorance of the lesson to avoid disappointing the students.
   老师恳求无知，以避免让学生们失望。