我想发明一种神奇的安全帽。这种帽子的外表跟普通帽子差不多,但只要把这种帽子放在太阳下晒几分钟,冬天它会有保温的功能,夏天它会有防热的功能。而当你过马路面临危险状况时,它会自动发出警报,提醒你避开危险。另外将帽子上的带子拉紧,装上耳机,你就可以听音乐了。这样,在你走路时就不会孤独和无 I want to invent a magic helmet. This hat looks almost ordinary hat, but as long as the hat in the sun for a few minutes in winter it will have insulation function, it will have summer heat-resistant features. And when you cross the road in a dangerous situation, it automatically alerts you to avoid danger. In addition the strap on the hat taut, fitted with headphones, you can listen to music. In this way, you will not be alone and without you as you walk