His dog is too wild, so it is hard to keep under control.他的狗太野了, 所以很难去控制它.We should try to keep under control and put it to the best use of mankind.我们应该使之置于我们控制之下,使其为人类发挥出最大作用....
The indiscriminate use of fertilisers is damaging to the environment.乱用化肥会破坏环境。Modern fertilisers should be used judiciously.使用现代化肥应该非常谨慎。Farmers are reducing their use of chemical fertilisers to improve pollution levels...
短期内, 那些变异体就会在以后的爆发中起主导地位.In short order, those strains become dominant in the next outbreak.而一旦分离出变异体, 对应的突变基因就可以鉴定出来了.Once mutants have been isolated, the mutated gene can be molecularly identified.果胶是由半乳糖变异体和葡萄糖变异体角素构成...