名词
中文翻译：有效期限
同义词：
['duration', 'period', 'term']
例句：
-
1. The project will be completedwithin the effective duration of six months.
该项目将在六个月的有效期限内完成。
-
2. Thecompany has a three-year effective duration for its employees.
该公司为员工设定了三年的有效期限。
-
3. The agreement has an effective duration oftwo years.
该协议的有效期限为两年。