Treating a person to a meal never fails, and is so easy to do. It’s powerful with old friends and a great way to make new friends.
上帝在家里,我们出去散步了。
如果你觉得你看到了一只老鼠,那么你肯定就是看到了。而且,如果有一只的话,就会有更多。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.