The challenge of our time is to harness energy without harming the planet.
我们这个时代的挑战是在不伤害地球的情况下利用能源。
I don't need a reason to be bold.
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。
The steel industry must embrace sustainability or risk becoming obsolete.