每一定人数中发生的犯罪数量的英文

the number of reported crimes per specified number of the population

• 每:    every; each; per
• 一定:    fixed; established ...
• 中:    hit; fit exactly
• 发生:    happen; occur; tak ...
• 的:    4次方是 The fourth po ...
• 犯罪:    commit crime
• 数量:    quantity; quantum; ...