doughnut structure

基本解释

A"doughnut"type assembled structure of gold nanoparticles was formed at the bottom of the polystyrene nanoparticles.
金纳米粒子在聚苯乙烯纳米粒子底部自组装聚集，形成规则的“面包圈”结构。
Also known as the torus, this large doughnut-shaped structure sits in the centre of the reactor building at a lower level than the reactor.
这个巨大的油炸圈形（圆环形）的构筑物坐落在反应堆建筑的中心，它的标高比反应堆低。
The heterogenous 8-shaped knot is formed by changing one of two X-shaped cross structures at the middle part of the standardized 8-shaped knot into Chinese doughnut-shaped twisted structure.
异型8字结是将规范的8字结中部的两个X形交叉结构中的一个，变换成麻花状绞纽结构的一种结扣形式。
ip.com

Paul Andreu designed the first terminal at Charles de Gaulle, north of Paris, as a doughnut-shaped structure with glass tubes crossing through the middle, but when it came time to expand the airport, in the nineteen-eighties, only a few years after the first part was finished, his futuristic form seemed more like a cartoon than like a functional building, and more conventional terminals were ordered up.
NEWYORKER: Situation Terminal