"The best children's books are the ones that make children feel seen and heard."
竞争战略就是要与众不同。它意味着有意识地选择不同的活动组合来提供独特的价值组合。
数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。
"The world is changed by your example, not by your opinion."