return engine造句

例句与造句

1. In view of this, the orbital module was separated before the ignition of the return engine until the late 1980s.
2. In 2005, US companies, Orbitech and XCOR Aerospace, developed a demonstration liquid oxygen / liquid methane rocket engine and a larger-thrust engine in 2007 for potential use as the CEV lunar return engine, before the CEV program was later cancelled.
3. It's difficult to find return engine in a sentence. 用return engine造句挺难的