Tie a heavy weight at the end of a long piece of string.

把一个重物拴在一根长绳子的一端。

youdao

You can catch fish with just a net, or even with just a long piece of string, a hook and some bread.

你可以用鱼网甚至是一根长线，鱼钩和一些面包就能钓到鱼。

youdao

To keep himself awake as he flew east during the long night, Post tied a piece of string to one finger.

VOA: special.2009.03.18

On this back side of the island, the West Maui Mountains exert themselves and push the road around like a piece of string, tight switchbacks yield to long swooping arcs that bring me deep into valleys and then shove me back out toward the coast.

CNN: Driving Maui's wild highway