| 释义 |
doughnut/ˈdəʊnʌt/n. (US [美] donut) 1 a small fried cake of sweetened dough, usu. in the shape of a ball or ring 炸面圈(通常球形或圈形) 2 a ring-shaped object, esp. Physics a vacuum chamber for acceleration of particles in a betatron or synchrotron 环形物；【物理学】环形室(电子回旋加速器或者同步加速器中粒子加速的真空室) |