并列题名：Smile can change world Smile can change world 并列题名：Loneliness can change the world 并列题名：Machine that changed the world 并列题名：To live to change the world 并列题名：Voyage that changed the world 并列题名：Medicines that change the world 并列题名：Design change the world 并列题名：Books that changed the world 并列题名：Ideas that changed the world