李华看见了学生会组建科学俱乐部的宣传海报,劝说Mark去参加 1:这是接触科技的好机会 2：可以跟其他同学互相交流学习,

Dear Mark,I was informed that the student union had organized a science club。 i Suggest we go and enrol as members of the club。 I think this is a good way for us to come in contact with new development in the scientific field。 We are able to interact with other club members to get more latest news on science。 I would also be keen in participating in tne club activities and campaign。 We would also have chance to meet science specialists and listening to their lectures。I hope you will join me in the club membership application。 Sincerely。LiHua