1.Irrigation systems can make a big difference in agricultural production.
make a big difference 产生很大的不同;意义重大;有很大影响
My belief in God has made a big difference in my life.
我的信仰使我生命有极大改变 。
Your help has made a big difference - I understand the work better now.
你给予的帮助起了大作用 - -我现在对工作比较熟悉了 。
2.In fact, we saw the opposite. This transition stage was characterized not just by heightened malaria risk, but also by more intervention to control the mosquito vector.
characterized by 以...为特征
His work is characterized by lack of attention to detail.
他的工作的特点是不注意细节 。
Mozart's music is characterized by its naivety and clarity.
莫扎特的音乐特色是纯朴兴清澈 。