1.pest control 害虫防治

Scientists say some European species of mice have developed resistance to the strongest pest control by crossbreeding with an entirely different species.

科学家表示，欧洲一些品种的老鼠通过与完全不同的品种杂交，对最有力的害虫防治方法产生了抵抗力%Xt8[=#V4qtqVYIuq@Et。

2.sterile 不育的

Such interbreeding is usually limited because the offspring are sterile.

这种异种杂交是非常有限的，因为他们的后代是不育的.wswz^SpBQ0f.h。

3.exposed to 暴露于

They were exposed to radioactive fallout during nuclear weapons tests.

他们在核武器试验过程中暴露于放射性核辐射=2!,rap4)*。

4.render 致使

Hundreds of people were rendered homeless by the earthquake.

成百上千的人因为地震而无家可归gP]K4]|vnvh=VS。