stairs
[sterz]
n.
楼梯;
楼梯（ stair的名词复数 ）;
（楼梯的）一级;
阶;
例句:
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She lay at the bottom of the stairs, whimpering in pain.
她躺在楼梯底部，痛得呜咽着。
来自柯林斯例句
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He picked up his suitcase and climbed the stairs.
他拎起手提箱,爬上了楼梯.
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Llewelyn was mounting the stairs up into the keep.
卢埃林登上台阶，走进城堡主楼。
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Walking up and down stairs causes the same thing.
来自SA
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The early ones couldn't even go up stairs.
来自THETIMES
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Joe started doing pull-ups on the stairs at home.
来自THETIMES