convex ends造句

例句与造句

1. The third is too deep in the ground and will require too much time to recover . " He also discovered that morning an ischium ( one of the pelvic bones of a dinosaur ), another vertebrae with " a convex end, " and what he described as " a gigantic claw ".
2. It's difficult to find convex ends in a sentence. 用convex ends造句挺难的