三级火箭

多数的航天飞机都是用三级火箭推入太空的。

Most spacecraft are launched into space on top of a three-stage rocket .

此前，朝鲜宣布计划于12月10日至22日之间向太空轨道发射一枚三级火箭。

North Korea announced plans to launch a three-stage rocket between December 10th and the 22nd to put a satellite into orbit .

他们点燃了第三级火箭。

They fired the third-stage rocket .

韩国国防部和日本防卫厅的官员都证实说，三级火箭看起来全部按照计划分离。

South Korean and Japanese defense officials confirmed that all three stages of the rocket appear to have separated as scheduled .

分析了某运载火箭的第三级火箭在星箭分离后，贮箱内剩余推进剂排放的物理过程；

The physical processes of remained propellant space emission from the tank of the third stage rocket after the separation of satellite-rocket for a launch vehicle are analyzed .

麻生太郎在新闻发布会上表示：日本无法避开全球衰退的海啸，但它可以努力寻找出路。在会上，他把日本的经济刺激方案比作一个三级火箭。

Japan cannot avoid the tsunami of the world recession , but it can try to find a way out , Mr Aso told a news conference , in which he illustrated the government 's stimulus plans with a diagram of a three-stage rocket .

其中又有四分之三和一级火箭有关。

Of that , three quarters is tied up in the first rocket stage .

“长征三号”运载火箭是三级火箭，主要用于发射地球同步轨道有效载荷，运载能力为1.5吨。

Long March 3 ( LM-3 ) is a three-stage launch vehicle , primarily intended for sending spacecraft into Geosynchronous Transfer Orbit with the GTO capacity of l.