Pngtree提供免費的PNG圖片素材，背景圖庫和向量圖案下載。 數百萬高品質的免費PNG，PSD，AI和EPS文件可供選擇。

A+医学百科是一个开放的在线医学百科全书网站，涵盖疾病百科、症状百科、药品百科、急救百科等医学保健知识。欢迎加入A+医学百科，与我们一起普及医学常识，推广健康生活方式。

500px is a photography community where you can get immediate exposure with your first upload, connect and share your photos with the world, and grow as a photographer from anywhere

优优教程网灵感频道,设计师没灵感?在这里你可以找到Banner设计,海报设计,logo设计,UI设计,网页设计,App设计等灵感,来优优,找设计灵感.

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.

虽然还有很多功能还没开发，可还是不得不提前退场。很多事情并不以个人意志为转移。

Electronic Library. Download books for free. Over 2 million books and magazines | BookSee - Download books for free. Find books

An application to create high quality Gifs from videos easily. For when you just need a Gif.

@rsapkf's wiki. [Merged into rsapkf/www]. Contribute to rsapkf/42 development by creating an account on GitHub.

:octocat: 分享 GitHub 上有趣、入门级的开源项目。Share interesting, entry-level open source projects on GitHub. - GitHub - 521xueweihan/HelloGitHub: 分享 GitHub 上有趣、入门级的开源项目。Share interesting, entry-level open sourc...

AMiner由清华大学计算机科学与技术系建立，包含了超过3.2亿学术论文/专利和1.33 亿学者的科技图谱，提供学术检索、论文检索，推荐订阅、论文专利、学者画像、文献追踪、趋势分析等科技情报服务，是拥有我国完全自主知识产权的学术科技情报大数据挖掘与服务系统平台。

A Bookmarklet That Helps You Find Awesome Free Stock Photos Online

以词搜句，搜索海量句子

An extensive collection of famous quotes by authors, celebrities, newsmakers, and more.

An advanced guide to learn English which might benefit you a lot 🎉 . 可能是让你受益匪浅的英语进阶指南。 - GitHub - byoungd/English-level-up-tips: An advanced guide to learn English which might benefit you a lot 🎉 ...

[AnyPaper]论文搜索终结者，借助百度文库的搜索以及对国内主流知识平台文献的解析，绝对是科研小伙伴的好帮手。目前支持百度文库中免费链接、知网论文，万方论文，维普论文的大多数文献。国外文献推荐使用SciHub进行下载。

💯 Curated coding interview preparation materials for busy software engineers

算法工程师(人工智能CV方向)面试问题及相关资料. Contribute to lcylmhlcy/Awesome-algorithm-interview development by creating an account on GitHub.

Chinese copywriting guidelines for better written communication／中文文案排版指北