Every piece of plastic we produce should have a clear path to being reused or recycled.

The only limit to our realization of tomorrow will be our doubts of today.

反过来，始终反过来：把情况或问题颠倒过来，从反面看。

变革在开始时最艰难，在中期最混乱，在结束时最美好。

你无法预先把点点滴滴串连起来，只有在回顾时才能明白它们是如何联系在一起的。