出国留学网英语栏目小编们精心为广大考生准备了“Smart Home Camera Detects Intruders”，各位同学赶快学起来吧，做好万全准备，祝各位同学考试顺利通过。 Many homes today are fitted with security cameras and sensors to alert the owners if someone is moving on their property, be it a family member, a mail carrie...