### 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, before choosing this training institution, it is best to inquire about the students from this institution. After all, only the students of the institution know how this institution is and whether the courses explained are good or not.
### Errors: There is a major error of incorrect translation does not accurately represent the correct translation at "training institution instead of training agency". There is a major error of incorrect translation includes information not present in the correct translation at "courses explained instead of course curriculum". There is a major error of incorrect translation is missing content from the correct translation at "inquire about the students instead of conduct research on the agency".

### 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.