初中英语牛津九年级上册课本03

[16:19.57]He participated in the development and production of different types of missiles
[16:28.11]and the first  Earth-orbited satellite in China.
[16:34.06]As well as science,heis also interested in medicine,
[16:40.54]philosophy and music,and is good at these things,too.
[16:47.60]On his 90th birthday,
[16:51.57]many leading scientists had a huge conference to honour his
[16:57.44]to honour his contribution to aerospace development.