现在天气冷极了，地面都冻硬了。It was bitterly cold now and the ground was frozen hard.把它冻硬，但是不要硬得像石头一样。Freeze it only until firm but not rock solid.雪橇在冻硬了的雪上顺利滑行.Sledges run well over frozen snow....
日新月异的世界使这家公司感到了压力。A changing world has put pressures on the company.雾蒙蒙，寒冷的空气使他脸上感觉很舒爽。The cold, misty air felt wonderful on his face.那项协议使人们感到战争有望很快结束。The agreement has raised hopes that the war may end soon....