grubbing的音标？

I simply cannot face grubbing through all this paper.我简直受不了要翻阅这么多文件。Farmers are grubbing up ancient varieties of crops.农民正在掘除自古以来就一直种植的各种作物。He found what he wanted by grubbing around in the library.他在图书馆乱翻一通终于找到了需要的资料....

v.（急切地但通常为不得法地）寻找（尤指资料）( grub的现在分词 )，挖土，找到（不好的人或东西），掘出...