大家好，我是小跳，我来为大家解答以上问题。be present in，be present很多人还不知道，现在让我们一起来看看吧！
1、楼主好,
2、The experts present at the meetingwere from different parts of the world.
3、The experts present at the meeting 做主语. prensent at the meeting做定语,省略了who/that. were.
4、写完整其实就是
5、The experts who were present at the meeting were from different parts of the world.
6、若有疑问及时追问，满意敬请采纳，O(∩_∩)O谢谢~~
本文到此讲解完毕了，希望对大家有帮助。