In later years, an increase in the death rate probably madeacontributionto further declines in prevalence, while the number of new infections remained more or less unchanged.
在接下来的几年里，死亡率的升高更进一步降低了艾滋病的流行，但新增感染人数变化不大。
2
He madea very positive contributionto the success of the project.
他对项目的成功贡献良多。
《牛津词典》
3
The laxity of export control authorities has madea significant contributionto the problem.