语言证明如下：
Re: English Proficiency Certification for Mr. ***
This letter is to provide verification that I believe that *** has sufficient English ability to benefit from a visit to *** University.
This is to certify that ***, male, born in 1989, a 3rd year PhD candidate from School of Mechanical Engineering, ***, supervised by Prof. ***. He will be highly welcome in *** as a visiting student to do his joint PhD training program. Based on the examination and Skype interview organized by our school, his written and spoken English level is good enough to study productively in my group and to collaborate with my other graduate students at ***. Moreover, I understand that *** has achieved several English scientific papers at the international journals and conferences. In addition, based my review of the manuscripts written during his past two years of Ph.D. research and my interaction with him so far over email, I believe that his written English is fluent enough to write up high quality papers that will arise from the collaborative research in my laboratory. So, I am very pleased to confirm that *** English proficiency is sufficient for him to study and conduct his PhD research.
Therefore, I strongly support Mr. ***’s application and hope that he will be able to join my group at the *** University in September 2016.
