单词 放射出来 例句 DEFINITIVE EXAMPLES 权威例句〔emission nebula〕A nebula that absorbs ultraviolet radiation from stars and reemits it as visible light.发射星云:吸收星体的紫外线辐射并且转变成可见光放射出来的星云美国传统〔sun〕The radiant energy, especi...