商务英语中级口语词汇解析：permillage

千分率（名词）

(noun) Any quantity, speed, or frequency measured "per thousand". (NOTE: compare with more common "percentage"which measures per hundred)

EXAMPLE: Highly sensitive scientific observations may require permillage calculations to identify tiny but significant changes in the data.

高敏感的科学观测可能需要千分率计算，以找出数据中微小但是重要的变化