population ratio的例句大全

Likelihood Ratio Test of the Lognormal Population

的平均比差值（？）对数正态总体的似然比检验

the student population in 1978 totaled 884, with a ratio of one lecturer for every fifteen learners.

1978年的学生总数为884名，师生比例为一比十五。

Field release test showed that the population of A.glabripennis could be suppressed with release ratio of5 ∶ 1.The major problem is artificial rearing of this species.

田间纱笼释放试验表明，释放比为5∶1可压低野生虫口数量。利用昆虫不育技术防治光肩星天牛的难点是人工饲养。

The simulated results indicate that there is a threshold of migration ratio in the migration of different genotypes influencing the resistance evolution of pest population.

模拟结果表明，迁入比例对害虫种群抗性演化的影响存在一定的阈值。