Dears,
Thanks for taking your time to read my resume.
Here I found your job advertisement on website, so I would like to apply for it. 
When I was a college student, I applied for a part-time as a volunteer in family center, where Native English speakers teach children English, and I was there to assist them by translating English into Chinese.
I hope it will be convenient for you to look over my resume. If there's any luck, an interview would be more appreciated.
Carl
Yours