Anchors are used to moor ships to the bottom of the sea, and are heavy and large.

锚用于将船只停泊在海底， 又重又大。

OK. So how do you take plant fibers that individually you could break with your hands and turn them into a rope that's strong enough to moor a ship that weighs thousands of tons?

那么你是怎么将只手可以拉断的植物纤维做成强韧到可以泊上万吨船的绳子的？