A Lecture on Space Flight

    Last Saturday I attended a lecture on flight. I am glad that I have learned a lot about . Now I know something about the structure of a rocket and understand the importance of flight to . I become interested in .
    Yesterday I borrowed sral books on from the  school library.I want to be a scientist in the ture.
注释:
    1) attend a lecture on flight聆听航天飞行讲座
    2) the structure of a rocket航天火箭的结构
    3) the importance of flight to 航天飞行对人类的重要性