范文里也碰上难句

wupeng0428UID: 2942633

Issue226(原书P116第一段)的范文里有这么一句，分析不出头绪，望各位帮忙，谢谢！！Many of the other problems are by their nature enduring ones that have changed little in complexity and difficulty over the span of human history...
红字部分应该怎样理解？多谢各位了！

咖啡盐UID: 2973669

没有全文，不知道哪个ones指代神马，字面意思可以理解为：长久以来的问题在人类历史的长河中没有变得困难和复杂

红字部分，大概是他们长久以来的blablabla....

wupeng0428UID: 2942633

谢谢:)终于有高人肯帮一下我这种菜鸟了。
原文第一段是这样：
Is any sense that the problems we face are more complex and challenging than those which our predecessors faced merely an illusion--one that can be dispelled by way of knowledge and experience? The speaker believes so, although I disagree. In my view, the speaker unfairly generalizes about the nature of contemporary problems, some of which have no analog from earlier times and which in some respects are more complex and challenging than any problems earlier societies ever confronted. Nevertheless, I agree that many of the other problems we humans face are by their nature enduring ones that have changed little in complexity and difficulty over the span of human history; and I agree that through experience and enlightened reflection on human history we grow to realize this fact.
字面意思我倒是能理解，就是不太清楚这个结构。应该是by their nature / enduring ones that...还是nature enduring ones that...（就是这个enduring应该是动词还是形容词？）第一眼看上去好像觉得nature enduring ones是一个词，这样好像前面的by就找不到后文了，如果是by their nature / enduring ones that...好像又很别扭
我觉得是不是我彻底就搞错了

蒲若苇UID: 2669670

应该是by their nature / enduring ones that...还是nature enduring ones that...（就是这个enduring应该是动词还是形容词？）

应该是前者，enduring后面的做nature的定语，这里的enduring=that could endure
不知道这样解释LZ明白吗？

wupeng0428UID: 2942633

非常感谢:)