英语听力：自然百科 虫虫兄弟—2（在线收听）

 The ones which steal your food, share your bed, shred your clothes and eat your life. You don't need to leave the sofa to go on a survey. You just need a scanning electronic microscope to capture the action happening right under your nose and sometimes in it. With the up to 5,000 times magnification, a parallel universe comes into the view. Even what eyes can see often goes unnoticed. But in this house, with cameras trailed on some of the smallest cracks and cavities,  few creatures escape surveillance.Every room of the house will be detected, starting with the bedroom. In the bug brother house, it's not the animals that are being watched. Meet Mr and Mrs Smith, the deluded couple who think they own this house. They have company. New research says they are just like people, some flies sleep at night and nap during the day. Containing over 100 tiny lenses, a fly's eyes can see movements in many directions at once. And with hairs on his body that detect vibrations, a fly sensed the alarm clock was about to ring. Elsewhere in the house, other tenants are stirring and some are getting hungry. For Mr and Mrs Smith, it's the start of another day. They are blindest to the thousands of freeloaders sharing every moment with them.