A sport, very close to gymnastics, in which all the moves are done on the floor or on a long springy track — rolls, flips, handsprings, somersaults — with no bars, no rings, and no high equipment. In competition it is often called power tumbling, and athletes run down a narrow bouncy strip doing a fast line of flips. Children's gymnastics classes in many countries are called tumbling classes, because that is where you learn to roll and flip safely before anything else.

A sport, very close to gymnastics一種很接近體操的運動, in which all the moves are done on the floor or on a long springy track所有動作都在地板上或一條長長的彈性跑道上完成 — rolls, flips, handsprings, somersaults翻滾、空翻、手翻、側手翻 — with no bars, no rings, and no high equipment沒有單雙槓、沒有吊環，也沒有高的器材. In competition在比賽裡 it is often called power tumbling常被稱為power tumbling, and athletes run down a narrow bouncy strip選手會在一條窄窄的彈性跑道上助跑 doing a fast line of flips連續做出一連串快速的空翻. Children's gymnastics classes in many countries很多國家的兒童體操課 are called tumbling classes就叫做tumbling classes, because that is where you learn to roll and flip safely before anything else因為在那裡會先學怎麼安全地翻滾和空翻，才學別的.

Note that this word is also just the -ing form of the ordinary verb 'tumble' (to fall over, to roll, or — of prices and numbers — to drop fast), so context tells you which one you are looking at: 'tumbling prices' is the everyday verb, 'she does tumbling on Saturdays' is the sport.

Note that this word is also just the -ing form of the ordinary verb 'tumble'要注意，這個字也可能只是普通動詞「tumble」的-ing形式 (to fall over, to roll, or — of prices and numbers — to drop fast意思是跌倒、滾動，或用在價格、數字上表示暴跌), so context tells you which one you are looking at所以要看上下文才知道是哪一個: 'tumbling prices' is the everyday verb「tumbling prices」是普通動詞, 'she does tumbling on Saturdays' is the sport「she does tumbling on Saturdays」講的是這項運動.