mac录视频头像是反的（mac录屏怎么不录外部声音）

 What oxygen is to the lungs, such is hope to the meaning of life. 希望对于生活的意义，就像氧气对肺那样那样的重要。

 Life is full of trial and error. One failure doesn't mean you're out of the picture. 人生充满了尝试与错误。一次失败不代表你就出局了。

 You can learn from people, and educate others, but the only one you can change is yourself.你可以学习别人，也可以教育别人， 但是你唯一可以改变的人，是你自己。

 Never get stuck with the thing that ruins your day. Stay upbeat and be happy; for life is too short to be wasted on crap.不要让不好的事情毁了你这一天，乐观一点，开心一点，生命如此短暂，别浪费时间在不值一提的事情上。