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N-COUNT
梯子
A ladder is a piece of equipment used for climbing up something or down from something. It consists of two long pieces of wood, metal, or rope with steps fixed between them.
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N-SING
（社会、组织或系统中晋升或降级的）梯级，阶梯
You can use the ladder to refer to something such as a society, organization, or system which has different levels that people can progress up or drop down.
例句
If they want to climb the ladder of success they should be given that opportunity...
假如他们有出人头地的意愿，就应该给他们那样的机会。
She admired her mother's sister for moving up the social ladder.
她羡慕姨妈社会地位的提升。
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N-COUNT
（女性长筒袜或裤袜的）抽丝，脱线
A ladder is a hole or torn part in a woman's stocking or tights, where some of the vertical threads have broken, leaving only the horizontal threads.
例句
Her hair was a mess and there was a ladder in her tights.
她头发乱糟糟，裤袜脱了线。