1、The power plant has a capacity of producing several megajoules per second.
这个发电厂每秒钟能够产生几兆焦耳的能量。

2、The spaceship needs a propulsion system that can generate millions of megajoules of thrust.
宇宙飞船需要一个能够产生数百万兆焦耳的推进系统。