cut back
phrasal verb with cut verb uk/kʌt/ us/kʌt/ cutting | cut
B2 减少，削减，缩减
to spend less, do less, or use less of something
The government has announced plans to cut back on defence spending by 10 percent next year. 政府宣布了明年国防开支缩减10%的计划。
If exercise is causing you pain, you should cut back. 如果运动让你觉得疼，就应该减量。