文章综述了壳聚糖的化学改性方法并展望其发展前景。
The method of chitosan chemical modification were reviewed and its development were prospected in the paper.
最后总结了课题研究的主要工作，并展望下一步研究工作。
Finally we summarized the main work of our research, and forecasted next step of research work.
我还将回顾过去一年中的主要事件，并展望今后需要做的事情。
I will also review the main events of the past year, and look ahead to what needs to be achieved in the future.
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