1·These animals could at any time break free from their ropes.
这些动物可以在任何时候从捆住他们的绳索中挣脱出来。
2·In ancient China, they were used to carry ropes across rivers.
在中国古代，它们被用来携带绳索过河。
3·It was clear that the elephants could, at any time, break away from their ropes but for some reason, they did not.
很明显，大象在任何时候都可以挣脱绳索，但出于某种原因，它们没有这样做。
4·The ropes let swimmers cling to the device or climb on top of it until a lifeguard arrives on the scene.
这种设备上的绳索使游泳者能够抓紧它或爬上其顶部，直到救生员抵达现场为止。
5·They also use ropes and special equipment.
他们还需要绳索和特种装备。