1.[U, sing] [~ (against sth)]保险（契约）
2. 不可数名词：保险业
3. 不可数名词：保险费
4.[C,U][~ (against sth)]保险措施，（预防损失、失败等的）安全保障
英语解释
- written contract or certificate of insurance
- promise of reimbursement in the case of loss; paid to people or companies so concerned about hazards that they have made prepayments to an insurance company
- protection against future loss