The deepest theorems often have the simplest proofs - if you look at them from the right angle.
What you actually pay for something is at least twice the listed price because of the energy， time， money needed to set it up， learn， maintain， repair， and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.
生活就是选择，但要选择得好，你必须知道自己是谁，以及你代表什么。
Once you label me you negate me.
信任是通过透明度和责任感建立的。
The biggest risk is not taking any risk.