| 释义 |
DEFINITIVE EXAMPLES 权威例句〔Ames test〕A test used to determine the mutagenic potential of a substance based on the mutation rate of bacteria that are exposed to the substance.埃米斯测试：一种根据曝露在物质周围的细菌的突变率来确定物质基因突变能力的测试美国传统〔rate〕Velocity is the rate of change of distance with respect to time.速度是距离对时间的变率。英汉大词典〔rutherford〕A unit expressing the rate of decay of radioactive material, equal to one million disintegrations per second.卢瑟福：反应放射性材料衰变率的单位，等于每秒一百万次衰变美国传统 |