要获得饱和均匀的装填是困难的.A saturated uniform packing is difficult to obtain.设计人员可选择小的通道直径,从而能得到较好的装填系数.The designer can select small port diameters and thereby achieve better loading fractions.每个小组通常有2名射手和2名装填手.This division was i...
Meteorologists say we are facing twenty years of colder weather and regional droughts.气象学家说我们面临着二十年较寒冷的天气和地区性干旱.Meteorologists have predicted mild rains for the next few days.气象学家预测接下来的几天有小雨。Meteorologists are at odds ov...