After hurricane Katrina hit New Orleans, 在卡特里娜飓风袭击新奥尔良之后，

　　thousands of volunteers visited the city to help victims of the hurricane. 数千名志愿者前往该市帮助飓风的受灾者。

　　Volunteers are people who work to help others. 志愿者是帮助他人的人。

　　They don't receive any money for their work. 他们的工作没有任何报酬。

　　Some people become volunteers purely because they want to help others. 有些人成为志愿者纯粹是想帮助别人。

　　Some people work for free because they want to gain work experience. 有些人免费工作是因为他们想获得工作经验。

　　Every day, thousands of volunteers in the world help others who need help. 每天，世界上有成千上万的志愿者在帮助那些需要帮助的人。

　　Some volunteers even risk their lives to help people in dangerous areas like Afghanistan. 一些志愿者甚至冒着生命危险帮助危险地区如阿富汗的人们。