### Instruction: Rewrite this English sentence to give a better translation.

### English: They cross thousands of kilometers in a fraction of a second, and as they do so, they not only curve space, but they leave behind in their wake a ringing of space, an actual wave on space-time.
### English rewrite: So they're crossing thousands of kilometers in a fraction of a second, and as they do so, they not only curve space, but they leave behind in their wake a ringing of space, an actual wave on space-time.