Manyhomeshavecamerastoprotectthemfromdanger.Thecamerasc...
问题详情:Manyhomeshavecamerastoprotectthemfromdanger.Thecamerascantelltheownersifsomeonehasentered.Butthecamerasdonotknowwhetherthepersonisafamilymember,afriend,apostmanoracriminal(罪犯).Butanewcameram...