51.get in touch via QQ

　　52.The Internet is so much more to A than you can imagine.

　　53.a aspiring student

　　54.After years of ups and downs

　　55.It's a lot more mainstream, I think, than people realize.

　　56.trigger/cause

　　57.women outnumber men 2-to-1 with the disease

　　58.This in part, prompted her participation in the campaign.

　　59.stem the spread of disease

　　60.remake its image as a center of international activities