英语翻译嗯 用我给的词语1.我要借此机会表达对你们的感激 occasion2.随著天气变冷,必须采取措施防止甲流的传播.

I want to take this occasion to express my appreciation.
As the weather got colder,it should take measures to prevent the spread of swine flu.
when the meeting is going to hold remains unknown.
In the past ten years,great changes have taked place.
whatever the difficulty we meet is,we should insist on our dream.
on the openning ceremony,the headmaster deliver a speach to all students and teachers.