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图片不多，但是质量很高，也比较有特色 Free stock photos for both personal and commercial use. High quality images for your website and blog free of charge. No attribution required.

日常生活摄影图为主，也是基于 CC0 授权。 This is a journey of a Portuguese guy moving that decided that every photo should be used for free. Help yourselves and use them wherever you want (CC0)

这个网站的所有图片，都来自公共领域，质量相对来说还不错。 Visit Skitterphoto to download free photos. No payment, no login required. Do you take pictures? Join us and start uploading your public domain photos today.

全部免版权可商用，以自然景观和动植物为主，质量一般。 Morguefile.com free photographs for commercial use.

基于 CC0 授权的自然风格摄影，图片质量都非常高，甚至还有视频素材分享。 free pics. do anything (CC0). make magic.

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免费的在线PNG图片素材库 Just a moment...

专注于提供高质量3D素材的网站，主要面向图形设计师和Photoshop用户

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免费高品质PNG图片素材 Discover a world of free PNG images. Download thousands of free PNG images on transparent backgrounds in high quality for any of your projects - PNGate

提供免费下载PNG图片的网站 You can free download transparent PNG images and free PNG clipart,for photoshop PNG pictures,PNG format files with transparent background,background PNG for web design | PngPngPng.com