Other common forms of synecdoche include two concentric circles or triangles (used as eyes in horse and bison paintings), ibex horns and the hump of a mammoth.

其他普通的提喻形式包括两个同心圆或者三角形(在壁画上马和犀牛的眼睛里也有使用)，野生山羊的羊角和长毛象弓起的背部。

youdao

Rainbows sometimes appear as two concentric bows with the inner one called the primary bow and the outer one the secondary bow.

彩虹有时会以两条同心圆弧形态出现。内弧称为主虹，外弧称为副虹或霓。

youdao

The shape problem of interface surface of bicomponent flows between two concentric rotating cylinders is investigated.

研究两个同心旋转圆柱之间的两种流体的交界面几何形状问题。

youdao

Their model consists of two concentric steel cylinders, three metres high and 80 centimetres in diameter, filled with molten sodium.

BBC: Planet Earth

Conventional optical fibres (the most common form of waveguide at the moment) generally consist of two concentric layers of glass.

ECONOMIST: New-age crystals

The radiation belt, which contains "two concentric rings of charged particles trapped by Earth's magnetic fields" doesn't affect current astronauts going to and from space because they are moving too fast to be hit by the radiation.

ENGADGET: Space elevator ride may kill humans due to ionizing radiation