添加图片注释，不超过 140 字（可选）
/root → /var/roothome
。业内人士推荐Line官方版本下载作为进阶阅读
for grammar, punctuation, and spelling errors in the text
Credit: NASA infographic
Amazon’s Fire TV Stick 4K Plus gets a better interface and a 40 percent discount
· 马琳 · 来源：tutorial资讯