他帮我们填满知识上的空白.He helped us to fill in a big gap in our knowledge.他们正在设法把空隙填满.They are trying to block in the space.湖里几乎快被淤泥和植物填满了。The lake was almost solid with silt and vegetation....
However , the noise spectrum of the ash exhauster always centers at low frequency range.排粉机噪声呈明显的低频特性.The utility model relates a linkage device of a cooking fume exhauster and a gas stove.一种燃气炉与抽油烟机的联动装置....