You have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

表示论提供了表达许多数论现象的语言。

故事帮助我们理解生活的混乱。

Innovation is not just about technology; it's about changing the way people think and live.

Innovation in technology allows us to see farther into space than ever before.

"La soledad es el precio que a veces pagamos por ser diferentes."

儿童不仅在心理上是被动的，而且像一个空花瓶，是一个有待于充满及塑造的生命。