我们比较了在中国经历的心得。

We ___compared ___notes about our experiences in China.

家长和老师应该定期交流对学生表现的意见。

Parents and teachers should regularly ___compare ___notes on the student's performance.

在参加了同一个研讨会后，他们坐下来交流所学心得。

After attending the same workshop, they sat down to ___compare ___notes on what they had learned.