due diligence
noun
mass noun
1- Law reasonable steps taken by a person in order to avoid committing an offence, especially in buying or selling something【律】（尤指买卖中为避免犯罪所采取的）适当措施。
1.1
- a comprehensive appraisal of a business undertaken by a prospective buyer, especially to establish its assets and liabilities and evaluate its commercial potential（尤指有意向的购买者为确定企业的资产债务等而进行的）综合评估, 必要核计。