There are two soil structures, square and round in shape.

土楼有两种，方形和圆形。

youdao

Round beads,square beads and beads in a riot of other shapes, sizes and colors.

VOA: special.2009.05.18

"People deserve to be able to travel in comfort, and the industry has been trying to fit all the square pegs into round holes and hasn't been taking into account that for a lot of people, traveling by air is an uncomfortable experience, " he said.

CNN: Pay-as-you-weigh airfares the 'next step'

The shapes of nails are even changing, from traditional round and square to diagonal and borderline-threatening almonds and pointy stilettos.

CNN: On main street and the runway, nail art is the new lipstick

The plans for first-innings centurion Tamim remained unchanged and there were only two slips in place and men deposited on the square leg and backward point boundaries as Anderson opened up from round the wicket to the 21-year-old left-hander.

BBC: Ruthless England seal innings win against Bangladesh