The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.

最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。

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During a game, while sliding into third base, my cleat caught and pulled my foot to the right and backward as my body fell forward.

一次比赛，在进第三垒时，我的防滑钉被卡住了，身体朝前栽倒，脚腕却扭向右后方。

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Shall we sway backward and forward, Mary, as if we were dervishes?

玛丽，我们要不要前后晃来晃去，就好像我们是托钵僧似的？

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Other firms claim that their backward-looking and forward-looking measures are even more closely correlated.

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They include backward and forward, single- and double-leg jumps lasting approximately 30 seconds each.

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The only way to show compensation still rising is to combine forward- and backward-looking measures of pay in any year, a misleading statistical technique.

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