subsurface trace造句

例句与造句

1. So the region of spacetime we can see right now that is, Earth's past light cone is the subsurface traced out by the red line and its counterparts in other directions ( most of which can't be drawn on this surface since two dimensions of space are missing ).
2. It's difficult to find subsurface trace in a sentence. 用subsurface trace造句挺难的