pick at什么意思解释？

Vultures flew around in the sky waiting to pick at the carcass of the deer.秃鹰在天空盘旋等着啄食鹿的尸体.There is no need to pick at him all day long. He's a child after all.不要老是对他唠唠叨叨, 他毕竟还是个孩子嘛!I would like to know the Bus numb...

pick at的音标：pick at的英式发音音标为：[pik æt]pick at的美式发音音标为：[pɪk æt]...