Varactyls have great strength, and their heads are protected by an armored skull of densebone.
蜥趾龙力大无比。厚实的头盖骨像头盔一样保护着他们的头部。
2
Dinosaurs tend to have highly vascular zed bone early in life and then develop densebone with growth rings as they reach maturity.
恐龙在其一生的前阶段拥有密布血管的骨骼,而当其成年以后则具有厚厚的骨骼。
3
While in material of natural bone group, fracture line disappeared after 8 weeks with densebone callus at the site of bone defects, and by 12 weeks bone marrow still not recanalized.