### Chinese: 其次在选择之前打探一下这个培训机构，最好可以打探一下这个机构出来的学生，毕竟只有机构的学生才知道这个机构到底怎么样，讲解的课程是好或者不好。
### English: Secondly, you can ask something about the training institution before making selection; you'd better ask something from students of the training institution; after all, only students of the training institution can know it well and know the teaching quality.
### Errors: There is a major error of incorrect translation does not accurately represent the correct translation at "ask something instead of conduct some research". There is a major error of incorrect translation is missing content from the correct translation at "training institution instead of agency". There is a major error of incorrect translation includes information not present in the correct translation at "something instead of something about the agency". There is a major error of incorrect translation has stylistic problems at "you'd better ask something from students instead of you should contact former students".

### Improved English: Secondly, you shall do some research on the agency before choosing it; it’s best to contact former students of the agency; after all, only students know how the agency really is and whether the curriculum is good or not.