attrition
noun [ U ] uk/əˈtrɪʃ.ən/ us/əˈtrɪʃ.ən/
formal（尤指给敌人的力量或自信造成的）消耗，损耗，削弱
gradually making something weaker and destroying it, especially the strength or confidence of an enemy by repeatedly attacking it
Terrorist groups and the government have been engaged in a costly war of attrition since 2008. 自2008年以来，恐怖主义组织和政府之间一直在进行两败俱伤的消耗战。
business US (UK natural wastage)自然减员
a reduction in the number of people who work for an organization that is achieved by not replacing those people who leave
US (UK wastage)中途辍学者
the people who leave an educational or training course before it has finished
The high attrition rates on the degree programs are a cause for concern. 学位课程的高辍学率令人担忧。