And what the carpenter did, because he was quite a clever chap, is he went to stand on that spiral staircase and he let his plumb line down and he drew it back up.

而木匠做的， 因为是个相当聪明的人，就是那螺旋楼梯， 放下的铅线， 然后又收了回来。

Sivert especially had a genius for knocking in nails, but Eleseus was better at handling a plumb-line.

Sivert 尤其擅敲钉子， 但 Eleseus 更擅处理铅线。

Drake would have learned to feel his way along the coast with his lead line.

德雷克应该学会了用铅线沿海岸摸索前进。