unpolluted是什么意思

用法例句

The nataral hatching rates of the fertilized-eggs laid by queens(QFG),the unfertilized-eggs laid by queens(QUG) and the unfertilized-eggs laid by workers(WUG) in the colonies of honeybee,Apis cerana cerana were campared.

以中华蜜蜂(Apis cerana cerana)为实验材料,对蜂群中蜂王产的受精卵(QFG)、蜂王产的未受精卵(QUG)和工蜂产的未受精卵(WUG)3者之间的自然孵化率进行了比较研究。