"Assessing dual intent
A person’s desire to apply for permanent resident status in Canada may be legitimate. An officer should distinguish between an applicant whose intentions are bona fide and an applicant who has no intention of leaving Canada at the end of their authorized stay if the application for permanent residence is refused.
In assessing bona fide, the individual circumstances of the temporary resident applicant must be examined; refusals of non-bona fide temporary residents may only withstand legal challenge when the refusal is based on the information related to the specific case before an officer."
估计就是不相信你是真的想来学习,是想通过这次机会移民。你可以根据官网的建议,重新写一下解释信。
“Refusals
Refusals do not stem from having two intents. They stem from having a single bona fide intent (i.e., to become a permanent resident) and misrepresenting the second intent (i.e., to become a temporary resident) in order to achieve the first intent.
For example: an applicant for a work or study permit who indicates that they have no intention of leaving Canada has demonstrated only a single intent – permanent residence. This application would be refused, even if the applicant might qualify for the Canadian Experience Class (CEC) or the Provincial Nominee Program (PNP). This is because the applicant has shown that they do not respect the terms and conditions of temporary residence, should they not qualify for a Permanent Resident stream.”