And when the great big parachute opened, we knew that if it didn't open there's a second parachute, and it runs on a nice little clockwork mechanism.
当巨大的降落伞打开时， 我们知道如果它无法打开 有第二个降落伞备用， 并且它的运行水平 犹如一个钟表装置般精密。