边材含有木质导管, 但不如中心木质那样坚硬.Sapwood contains xylem vessels, but not as strong as heartwood.毛白杨边材材色株间存在显著差异.Thecolor of sapwood of Chinese white poplar among trees has significant difference.边材色稍浅,仅导管槽带有红色.Sapwood pale colored ...
This can tear the tiny stretched blood vessels and cause bleeding and hematomas.这样会把绷紧了的小血管撕裂,引起出血和脑血肿.Fractures of the nose may be associated with septal tractures and hematomas.鼻骨骨折可伴有中隔骨折和血肿.Localized fluid collection...