If you were to slice a real igloo in half, you'd see a shape called a catenary.

如果把真正冰屋分成两部分，你可以看见悬链状。

This gradually sloping shape is the same one that would form if you held a chain from both ends and let it droop.

如果你拿着一根链条两端，让它自由地落，得状就是悬链。

All cables sag under their own weight, following a curve called a catenary.

所有电缆都在自身重量作垂，遵循一条称为悬链曲。

If you know the weight of the cable, you can use the catenary equation with the measured sag distance to estimate cable force fairly accurately.

如果您知道电缆重量，则可以使悬链方程和测量垂距来相当准确地估计电缆力。

If you watched my video about the science of igloos, you remember that this shape, called a catenary arch, distributes tension and compression more evenly than a half circle shape.

如果你看我关于冰屋原理视频，那么你会记得这种称为悬链拱状比半圆更均匀地分布张力和压力。