the thick layer of skin underneath the epidermis (= thin outer layer ) that contains blood vessels , sweat glands and nerve endings
发音
例句
1. The dermis is composed of the connective tissue that supports the epidermis. 真皮是由支撑表皮的结蒂组织构成的。 2. Althouth very thin, the epidermis serves to protect the underlying dermis. 表皮虽然非常薄,却可用来保护下层的真皮。