To drive out a wolf only to let in a tiger; to get rid of one danger only to bring in a worse one; out of the frying pan and into the fire.
公司试图通过更换供应商来降低成本，但新供应商的服务质量更差，这真是拒狼进虎。
The company tried to reduce costs by changing suppliers, but the new supplier's service quality was worse, which was truly like repelling a wolf only to admit a tiger.
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