Leadership means making tough decisions today that will benefit the company in the long run.
A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.
这很简单,你只需拿些东西,对它做点什么,然后再做点别的。
Sustainability isn't just about planting trees—it's about planting the right trees in the right places, for the right reasons.