Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.
时间是个滑溜溜的东西：一旦失去控制，它的线索可能会永远从你手中溜走。
When we protect biodiversity, we're protecting humanity's safety net.
沙漠不能被声称或拥有——它是一块由风携带的布，从未被石头固定，被赋予了一百个变化的名字。