adj (onlybeforea noun 只用于名词前) 1 (especially US 尤为美) (used about murder 指谋杀) of the most serious kind 一级的（最严重的）
2 (used about burns 指烧伤) of the least serious of three kinds, affecting only the surface of the skin （第）一度的（最轻度的） ☞Look at second-degree and third-degree. 参看second-degree及third-degree。