Dài yǎnjìng de rén bíliáng shàng huì liú xià yāhén.
People who wear glasses often have marks left on their nose bridge.
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memory
鼻梁 literally means 'nose beam/bridge' (鼻 = nose, 梁 = beam/bridge). Just like a bridge (梁) spans across something, the bony bridge spans across the top of your nose.
