这样就产生了目前各种船舶上普遍应用的回声探测仪.So was born the echo - sounding apparatus, now in general use in ships.大多数共振质量探测仪是由巨大的圆柱形铝棒构成.Most resonant mass detectors are made of large, cylindrical aluminum bars.建造共振质量探测仪不像建造激光干涉计探测仪那么昂贵.Re...
More people would be attracted to cycling if conditions were right.如果天气适宜，会有更多的人被吸引到骑自行车的行列中来。Recently I've started to do a lot of walking and cycling.最近我开始经常散步和骑自行车。She was cycling along a country road near Compieg...