No statistically significant difference in asthma control, pulmonary function, exacerbation rate and drug reactions were found in each down-stepped period between the two groups.

两组各降阶梯哮喘控制率、肺功能、哮喘加重率和药物不良反应发生率比较，差异无统计学意义。

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He stopped just as his truck tilted down the steep incline, put on the handbrake, and stepped out.

就在他的卡车沿陡峭的斜坡向下滑的时候，他停了下来，拉住了手闸，然后下了车。

《柯林斯英汉双解大词典》

She stepped down from the train onto the platform.

她走下火车来到站台上。

《牛津词典》

Meanwhile,Britain's special envoy to Afghanistan, Sherard Cowper-Coles, has stepped down.

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Mr. Lazaridis' departure comes after he and longtime co-CEO Jim Balsillie stepped down as co-chiefs of the company early last year.

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His longstanding role as a non-executive director at British American Tobacco - from which he stepped down in 2008 - often attracted fierce criticism.

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From public scandal -- she stepped down as the first black Miss America after nude photos of her appeared in Penthouse magazine -- to Broadway triumph, Williams has been on the celebrity radar for decades.

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