bucket seat

(in a car or an aircraft) seat with a rounded back, for one person （汽车或飞机上的）凹背单人坐具.

brutish, brutishly, BS, BSc, BSI, BST, Bt, BTA, Bthu (also Btu), bubble, bubble and squeak, bubble bath, bubble gum, bubbly, bubonic plague, buccaneer, buck, buck-tooth, bucked, bucket, bucket-shop, buckeye, buckle, buckram, buckshee, buckshot, buckskin, buckwheat, buckwheat flour, bucolic, bucolics, bud, Buddha, Buddhism, Buddhist, budding, buddy, budge, budgerigar, budget,