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1. The rigid classification of animals into different groups has been a topic of debate for centuries.
动物被严格分类为不同组别，这一话题已经争论了几个世纪了。
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2. The rigid rules of the game made it difficult for players to adapt to changing circumstances.
游戏的规则非常严格，这使得玩家很难适应不断变化的情况。
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3. The company's rigid structure prevented innovation and hindered progress in the industry.
公司的严格结构阻碍了创新并阻碍了行业的发展。
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4. The rigid approach to environmental protection may not always be effective in achieving long-term sustainability goals.
对环境保护采取严格的方法可能并不总是有效实现长期可持续目标。
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5. The rigid deadlines set by the project manager were causing delays in the completion of the work.
项目经理设定的严格截止日期正在导致工作完成时间的延误。