“经营期限”常见的英文表达是 “operating period” 或 “business operation term”。
operating period：较为通用，强调企业实际开展经营活动的时段。例如：The company has set a five - year operating period in its business plan.（该公司在其商业计划中设定了五年的经营期限。）
business operation term：更侧重于法律或合同层面规定的经营时长概念。例如：The business operation term of this joint venture shall be 20 years from the date of its establishment.（这家合资企业的经营期限自成立之日起为20年 。 ）