bottom step

基本解释

Step on it Before you lug those backpacks upstairs, stop and stand on the bottom step for these calf toners.
在你到楼上收拾背包之前,先停下来用楼梯边练练小腿腓肠肌.
Using a staircase, sit and straighten your legs so that your feet push against the bottom step, toes upright.
利用楼梯，你可以坐下，并伸开你的双腿，这样你的脚刚好能顶住台阶底部，并且脚趾向上。
The upper level houses a kitchen and dining area, from which a spiralling black metal staircase with a bottom step that appears to float above the ground descends to the bedroom.
楼上有厨房和用餐区，在这里，一个螺旋式上升的悬空踏步黑色金属楼梯似乎漂浮在地面上，并上升到卧室。

In Transparency International's just-released 2009 survey of world corruption, Afghanistan was only one step above the bottom rung,ranking 179th out of 180 countries surveyed.

They ride the escalator down in silence, staring out the large windows toward Broadway, toward the familiar thickening rush-hour crowd, until they reach the bottom and step off.
NEWYORKER: M&M World
"It's always easier to come from the top and take a step down than to do what Xerox and HP are trying to do: Come from the bottom and take a step up, " says Susanne Schwartze, an analyst with M.
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Bottom line, if something changes, or you step on a landmine, you always have some time to lose a limb without blowing up.
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