youdao

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。

youdao

If every child making progress and reaching their potential is what matters, then Professor Alexander's proposals are a backward step, " he said.

假若每个孩子取得进步和发挥潜力显得那么重要，那么亚历山大教授的建议就是一种倒退。” 他说。

youdao

So some might be forgiven for thinking they were taking a backward step bringing their hour-long show, entitled Chase the Dream, Not The Competition, to Edinburgh's Udderbelly, which holds just 410 people.

BBC: TV dance troupe Flawless in 'clever' Fringe move

This is -- would be a giant step backward.

WHITEHOUSE: Press Briefing

Philip Ruddock, the immigration minister, has taken a backward step by introducing a kind of second-class citizenship for some refugees.

ECONOMIST: Huddled masses