我已经不再年轻,不再无所不知。
I am not young enough to know everything.
As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.
I'm the reason your sound won't echo.
最大的风险是不承担任何风险。
我们需要思考如何让计算机以更直观和自然的方式为我们工作。