They reach world-class levels after launching more than 50 unmanned satellites, boosted by Long March rockets.

在用“长征”系 列火箭发射了50 多枚卫星之后，他们达到了世界级的水平。

youdao

A number of China's rockets (Long March rockets) and satellites have been launched from the Xichang satellite launch Center.

中国的许多火箭(“长征”号系列火箭)和人造卫星都是从本省的西昌发射中心发射的。

youdao

The Shijian-8 is the 90th space flight made by Long March rockets and the 23rd time China has launched a recoverable satellite.

“实践8号”育种卫星是中国发射的第23颗可回收卫星，这次发射也是长征系列运载火箭的第90次飞行。

youdao

Chinese Long March 3B rockets to launch its satellites between now and the year 2002.

CENTERFORSECURITYPOLICY: Center for Security Policy | Clinton Legacy Watch # 21: Efforts to Help Chinese Missile Program Reek of Corruption, Betrayal of U.S. Interests

This ultimately built the Shenzhou series of spacecraft and put them on top of a booster modified from one of China's unmanned Long March satellite-launching rockets.

ECONOMIST: China in space