1·The Cubans had attached floats and propellers to a 1951 Chevy truck.
这些古巴人在一辆1951年的雪佛兰卡车上安装了浮筒和螺旋桨。
2·He conducted tests to show that they could recognize different vessels by the sounds of their propellers.
他的试验表明，海豚可以通过辨别螺旋桨发出的声音鉴定不同的舰只。
3·The first aeroplanes were driven by propellers and they flew slowly by present day standards.
第一架飞机是由螺旋桨驱动的，要比当今的标准飞得慢得多。
4·But I also knew how common it was for these lumbering giants to be gashed by boat propellers or entangled in crab traps.
但我也知道，它们这些笨拙的海洋生物经常被船的螺旋桨划伤，或卷入捕蟹器中。
5·Varying the speed of the propellers also provides a means of steering the aircraft.
改变螺旋桨各自的速度也因而成了操纵这部飞行器的方式之一。