阿里安航天火箭项目取得了辉煌的成功。

The Ariane space - rocket project has had a shining success.

阿里安5和当前正在使用的阿里安4相比，直径和贮箱容积以及推力都有了极大增加，还提高了可靠性要求。

Ariane 5 has a much larger they-diameter, tank capacity and greater thrust power than Ariane 4. The reliability of Ariane 5 also must be improved.

欧洲再入大气层试验飞行器是简单的不载人座舱式飞行器。它将随“阿里安5”火箭的第二次鉴定飞行发射升空。

The second qualification flight of Ariane - 5(V502) will carry an atmospheric Reentry Demonstrator(ARD) which is a simple unmanned capsule - type vehicle.