英国煤层的平均厚度为1米。The average UK coal seam is one metre thick.他正忙于勘探煤层.He is busy with proving up a coal deposit.煤层的炭化程度取决于温度.The degree of carbonization of coal depends on the temperature....
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...
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....