英语语法分析

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。

《柯林斯英汉双解大词典》

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。

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。