例句與造句

1. Ring mold craters are believed to be formed from asteroid impacts into ground that has an underlying layer of ice.
2. It has been known for some time that Mars undergoes many large changes in its tilt or obliquity because its two small moons lack the gravity to stabilize it, as our moon stabilizes Earth; at times the tilt has even been greater than 80 degrees As a result of these climate changes layers of ice are created that when struck by an asteroid can form ring mold craters.
3. It's difficult to find ring mold craters in a sentence. 用ring mold craters造句挺難的