the sun's power can quickly turn from salvation to threat. 太阳的热力很快从救星变成了威胁
But can he get close enough to pounce? 但他能够靠近到扑得着吗
and the rewards for the effort can be disappointing. 努力捕食却往往空手而归
so now they must put on as much weight as they can. 所以现在必须尽可能地增重
So the bears must feed as fast as they can. 所以灰熊必须尽快进食
an adult can put on 180 kilos gorging on plants 一只成年灰熊靠吃植物能长一百八十公斤
She can dive at 200 miles an hour. 她能以三百二十公里的时速俯冲而下