Google's new search by images function lets users copy and paste an image URL and drop it into the search box on the company's homepage, or upload a picture directly from their computer.
谷歌新发布的图片搜索功能在其主页上进行，用户只需拷贝和粘贴图片的超链接并将其拖放到搜索框中即可；用户还可直接上传自己电脑中的图片。
Fcomments, a function to return all comments, keyed by image id.
根据照片ID返回所有评论的函数。
get_comments is a new function to get all comments, keyed by image ID and then either the parent comment ID or the word noparent.
get_comments 是一个新函数，用来获得全部评论，按照片 ID 编排，然后按照父评论 ID 或 noparent 显示。
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