1. He has finally cracked the system after years of painstaking research. 经过数年的艰苦研究，他最终破译了该系统。
2. In fact, acquiring the exact meaning of number words is a painstaking process that takes children years. 事实上，掌握数字单词的确切含义是一个艰苦的过程，需要花费孩子数年的时间。
3. The leases come with painstaking stipulations to mitigate any possible environmental harm to species like the polar bear. 这些租约附带了细致的条款，以减轻对北极熊等物种的任何可能的环境伤害。
4. This intuition is not arbitrary or irrational, but is based on years of painstaking practice and hands-on experience that build skills. 这种直觉不是武断的或非理性的，而是建立在多年艰苦的实践和建立技能的实际经验的基础上的。
5. What is most impressive about the book is the intense and painstaking effort made by the author, Elizabeth Gaskell, to convey the experience of everyday life in working-class homes. 这本书最让人印象深刻的是，作者伊丽莎白·盖斯凯尔为描写工人阶级家庭的日常生活，付出了巨大的心血。
