be worried about什么意思解释？

be worried about的音标：...

I hate that they should be worried about trifles.真遗憾,他们竟为区区小事发愁.And should we be worried about Obama's mountainous self - confidence ?我们是否也应该反思一下奥巴马过人的 自信 呢 ?I hate that they should be worried [ them to be worried ]...