to have something, usually a large amount of important work, to deal with

She's got a lot on her plate - especially with two new projects starting this week. 她有很多工作要做——特别是这个星期她又开始了两个新项目。

The aid agencies have (more than) enough on their plate without having unnecessary visitors to take care of. 即使不接待那些不必要的来访者，援助事务所也已经忙得不可开交。