释义：一个人如果不树立志向，就像船没有舵、马没有缰绳，只能随波逐流、任意狂奔，最终不知会飘向何方、达到什么结果，强调了立志的重要性。

If we want clean air and water, we must start by protecting our forests.

A leader does not deserve the name unless he is willing occasionally to stand alone.

"In quantum mechanics, the act of observation changes the system being observed."

【大意】人的贪欲多了，就会亏损道义；忧虑多了，就会损害智慧；畏惧多了，就会伤害勇气。