我是来自高二*班的***,
I am from senior xx（年级）class xx（班）,是第四届全国青少年英语口语大赛河北赛区二等奖,
and I also was the second place winner of the forth competition of country's youth English spoken in HeBei.今天非常荣幸站在这里
Today it ìs a great honor to stand here.
就这么多拉!
That's all.（这句也帮你翻译出来吧）