逐步

gradually; progressively; incrementally; gradatim; gradual; progressive; stepwise; step-by-step; incremental; piecemeal; step by step; little by little; a step at a time; one step at a time; by degrees; stage by stage

加以

moreover; in addition; furthermore; besides

解决

solve; resolve; cure; settle; deal with; address; tackle; dispose of; work out; iron out; clear up; sort out; overcome; surmount; clinch; solution; resolution; settlement; solving; round; around