IFF

例句：

1. 1. I need to find out what the IFF is for.
   我需要弄清楚IFF是什么。
2. 2. The IFF is a group of people who work together to solve problems.
   IFF是一个由人们组成的团体，他们共同努力解决问题。
3. 3. The IFF is responsible for coordinating the activities of all members.
   IFF负责协调所有成员的活动。