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....
It was just gone 7 o'clock this evening when I finished.今晚我做完的时候刚过7点。He sat listening to the tick of the grandfather clock.他坐在那儿，听着落地式大摆钟嘀嗒作响。Outside, Bruce glanced at his watch: "Dear me, nearly oneo'clock."出了...