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1·He received a per diem allowance to cover his travel expenses.

他收到一笔按日计算的差旅费用补贴。《柯林斯英汉双解大词典》

2·During authorized business travel and work assignments, the company provides the required transportation and services and pays a per diem allowance to cover reasonable living expenses.

在核准的商务出差和工作安排期间，该企业提供所需的运输和服务，并支付每日津贴以负担合理的生活开支。