星航云坊石家庄地区葡萄花序的品质分析与综合评价（二）。

I usually studied about an hour although it is difficult at first, after a period of study that will find a way.After nearly 6 months of study, Every night,I have developed the habit of learning English. I hope I can stick to it and continue to study English.In the end, I would like to thank my English teacher for giving me the help and encouragement in my study.

星航云坊沙棘的化学成分、药理作用研究进展及其质量标志物的预测分析（二）。