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muddy the waters
to make a situation more confused and less easy to understand or deal with
把水搅浑，使变得更复杂
His suggestions just muddied the waters further, rather than helping the situation.
他的建议非但没有帮助解决问题，反而使事情更加扑朔迷离。
They’re just muddying the waters with all this new information.
他们只是在用所有这些新信息来搅浑水。