Makes you squirm, doesn't it? One reason I wanted to review these cameras is that this kind of technology isn't going away. 'Always on' cameras are becoming popular in home electronics like the Xbox One and a new wave of streaming video security systems. Now you can buy cameras that attach to your wrist, ear, bike helmet and eyeglasses.

让人不舒服，对吧？我之所以想对这种相机发表评论的一个原因是此类技术正方兴未艾。“无间断”摄像头正在Xbox One等家用电子设备以及新一轮流媒体视频安全系统产品中日益受到追捧。现如今，你可以买到戴在手腕和耳朵上、安装在自行车头盔和眼镜上的相机了。

The two cameras I tested are meant for everyday use. On the surface, they seem very similar: plastic clip-ons that silently take photos and store them until you upload them to a phone or computer. They arrange the photos in a contact sheet on your phone and use software to highlight the most interesting shots, or give you a sped-up video of your day.

我试用的这两款相机是为日常使用设计的。其外观大同小异，都是可夹式塑料外壳，它们默默地拍照并存储，直到你把照片上传到手机或电脑里。它们把照片储存在手机的图片索引里，还会用软件高亮最有趣的照片，或者快速播放照片，以视频的形式把你的一天呈现出来。

The Narrative is the least obtrusive. It could be easily mistaken for a tie clip. The Narrative has no buttons or screen, and just one function: It takes a photo of whatever is in front of it every 30 seconds, more than 2,000 a day, with quality comparable to the iPhone 4's camera.

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