图像比较滑块
封面 的演示短片，是图像比较滑块，其起源不太可考。不过还是能找到流行的源头：ZURB。ZURB 是网页设计公司，在开源领域也取得了不小的成就，比如响应式前端框架 foundatio。
2013年6月，ZURB 在改进 无头浏览器截图工具 时，需要展示两个图像之间的视觉差异。而常规的方法不够有效（就像「找不同」游戏一样麻烦），于是 设计主管 推荐了加拿大鹅网站的 仿冒品对比页面。
此页面中，用户能移动滑块，精确的比对两张图片相同位置的差异。然后 ZURB 的开发者使用 jQuery 复刻了此功能，并认为这个工具非常实用，于是在完善后开源到了 GitHub，其名为 TwentyTwenty。
附言：TwentyTwenty 的含义是指视力正常，因为 20/20 是指在 20 英尺距离，看到理论正常视力的内容，也就是 1.0 的视力。（说明「找不同」游戏确实麻烦）
ggame | #考据
Telegram is an aspiring new messaging app that’s taking the world by storm. The app is free, fast, and claims to be one of the safest messengers around. It allows people to connect easily, without any boundaries.You can use channels on Telegram, which are similar to Facebook pages. If you’re wondering how to find channels on Telegram, you’re in the right place. Keep reading and you’ll find out how. Also, you’ll learn more about channels, creating channels yourself, and the difference between private and public Telegram channels.
With Telegram, you can send messages, photos, videos and files of any type (doc, zip, mp3, etc), as well as create groups for up to 200,000 people or channels for broadcasting to unlimited audiences. You can write to your phone contacts and find people by their usernames. As a result, Telegram is like SMS and email combined — and can take care of all your personal or business messaging needs. In addition to this, we support end-to-end encrypted voice calls.
Telegram is a messaging app with a focus on speed and security, it’s super-fast, simple and free. You can use Telegram on all your devices at the same time — your messages sync seamlessly across any number of your phones, tablets or computers.
Telegram is for everyone who wants fast and reliable messaging and calls. Business users and small teams may like the large groups, usernames, desktop apps and powerful file sharing options. You can appoint admins with advanced tools to help these communities prosper in peace. Public groups can be joined by anyone and are powerful platforms for discussions and collecting feedback.In case you're more into pictures, Telegram has animated gif search, a state of the art photo editor, and an open sticker platform (find some cool stickers here or here). What's more, there is no need to worry about disk space on your device. With Telegram's cloud support and cache management options, Telegram can take up nearly zero space on your phone.
Unlike WhatsApp, Telegram is a cloud-based messenger with seamless sync. As a result, you can access your messages from several devices at once, including tablets and computers, and share an unlimited number of photos, videos and files (doc, zip, mp3, etc.) of up to 2 GB each. And if you don't want to store all that data on your device, you can always keep it in the cloud.Thanks to our multi-data center infrastructure and encryption, Telegram is faster and way more secure. On top of that, Telegram is free and will stay free — no ads, no subscription fees, forever.
Yes! Voice calls are currently available to users around the world.
Many modern travelers appear to struggle with managing various aspects of their finances simultaneously while abroad, such as banking, budgeting, investing, trading, and saving. It is important to have apps installed on the device that will help you carry out these necessary tasks.
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