ladder ['lædə(r)] n. 梯子，阶梯;梯状物;途径;（紧身裤袜或长筒袜的）滑丝 vi. 使（袜子）发生抽丝现象;像长筒袜一样抽丝 第三人称单数:ladders;过去分词:laddered;名词复数:ladders;现在分... [例句]You had warned him to use the ladder.你已经提醒过他用梯子了。.
stair [stZE]n.楼梯While climbing up the stairs the old man always loses his breath.那老人上楼时总是气喘吁吁的。(楼梯的)一级He slipped on the stairs and put his ankle out.他在楼梯上滑了一跤, 踝关节脱臼了。
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