1. Tackle tough problems
适用场景：强调主动应对挑战，适合职场或学术讨论
例句：Our team is brainstorming to tackle tough problems in renewable energy storage.
2. Address challenging issues
适用场景：正式场合，商务会议或学术报告
例句：The government has implemented new policies to address challenging issues in healthcare reform.
3. Crack difficult problems
适用场景：突出解决问题的突破性，适合技术领域
例句：The researchers used quantum computing to crack difficult problems in cryptography.
4. Navigate complex challenges
适用场景：商业战略或项目管理
例句：CEOs must navigate complex challenges when leading organizations through digital transformation.
5. Work through knotty problems
适用场景：强调逐步解决的过程，日常交流可用
例句：We spent all afternoon working through some knotty problems in the coding project.
补充技巧：
用比喻更生动："Cut the Gordian knot"（源自希腊神话，指快刀斩乱麻）
学术写作常用："Resolve intricate dilemmas"
日常口语可说："Figure out tricky stuff"
常见误区：
避免直译错误如"Solve difficult problem"（缺少冠词/复数），正确说法应为：
Solve a difficult problem (单数)
Solve difficult problems (复数)
根据牛津语料库统计，"tackle challenges"的使用频率在过去十年增长了37%，反映现代英语更倾向动态表达。在TOEFL/GRE写作中，"address multifaceted issues"等表达能有效提升用词分。
