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colour.less Br and AusH5kQl7E7lEs, $5-L-adjAm and Aus col.or.less Something that is colourless has no colour at all.无色的Water and glass are colourless.水和玻璃是无色的。Carbon monoxide is a colourless, odourless, poisonous gas.一氧化碳是一种无色、无味、有毒的气体。Colourless also means boring or uninteresting.无趣味的，沉闷的It is a rather grey, colourless city, with few interesting sights or historical monuments.这是一个十分灰暗、沉闷的城市，没有什么有趣的景点或历史古迹。
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