But experts looking at satellite imagery say that they believe that it was a rocket engine test.

但关注卫星图像的专家表示，他们认为朝鲜进行的是火箭发动机试验。

And you don’t get to actually test the rocket in the real environment that is going to be in.

而且您无法在将要进入的真实环境中实际测试火箭。

SpaceX reached new heights by testing its Falcon Heavy rocket in 2018 and sent Elon Musk's old red Tesla Roadster towards the asteroid belt.

SpaceX 通过在 2018 年测试其猎鹰重型火箭达到了新的高度，并将埃隆马斯克的旧红色特斯拉跑车送往小行星带。

" The country has waited for several months, through many failed unmanned Atlas rocket tests and 10 scheduled manned attempts, which were canceled for various mechanical or system complications."

“整个国家已经等待了数月，经历了许多次无人操作擎天神火箭测试的失败，10 次原定计划载人任务都遭到取消，原因归咎于机械或系统障碍。”