I think that my English is poor.

Today I talked with a Columbian girl.I felt a litter strain at the beginning.And then we talked something about her school.And she asked me some questions about chinese food.But felt that it was hard to express my ideas fluently.And I found that My quantity of vocabulary is so pinch.So I urge me to develop my English.And I think if I try my best I will succeed.As the saying goes：you should believe in yourself.That's the secret of success.