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When battery level becomes less than or equal to 15% , you can enter a nickname and start dying with…

‎Brain.fm provides music designed for the brain (generated by an AI we've invented) to improve focus, meditation, relaxation, naps & sleep within 15 minutes of use.

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‎Noisli.com 的官方应用程序- 适用于工作和放松的背景噪声和色彩生成器。高品质的周围环境声音，帮助你在工作里集中注意力，缓解焦虑，并且在你的冥想或瑜珈课程里也能有所帮助。它也能在你看书时或临睡前帮助你放松。

Noisli主要是用于淹没恼人的噪音，以使注意力能够更好地被集中和提高生产力。它也能制造愉快的音频环境，非常适用于放松或有助睡眠。

当你在一个 开放式的办公室里工作，并且四周都是大声说话的同事，这是否导致你不能专注？当你在家里或图书馆里工作学或学习时，你是否总是打不起精神？当你一直都在…

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Regex101 allows you to create, debug, test and have your expressions explained for PHP, PCRE, Python, Golang and JavaScript. The website also features a community where you can share useful expressions.

我们经常玩的一种文字游戏，网站可以在线将任意成语接龙到“一个顶俩”这个成语上，而网站也只能是这样，如果可以自定义接龙成语就更好了！

有一些花钱买放心的 business，如保险，教科书，杀毒软件等，有点像交保护费。这种类型的 business 需要长久累计下来的良好的信誉，用户活跃度不重要。