幸亏她有无穷无尽的耐心和铁一般的意志，她才得到了浓缩度较大的镭。

Thanks to her inexhaustible patience and iron will, she had obtained stronger concentrations of the radium.

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文章用幽默的笔调讽刺那些“头一碰枕头就入睡的人”。他说，这种人虽有“铁一般的意志”，却缺乏人情味。

In a humorous tone, he ironies those "as soon as my head touches the pillow," who lack human touch though with "iron wills."

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所以说假想自己适应了这个计划并且有铁一般的意志来坚持它已经算是足够疯狂了，对大多数人来说，它虽然看起来简单做起来却不容易。

So even assuming the subject is crazy enough to adjust to the schedule and iron-willed enough to stay on it, for many people it simply isn't possible.

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生活方式总是会让这个过程进行得不那么顺利，不管实践者怎样努力，再多铁一般的意志也弥补不了一个繁忙的工作日程或者照顾孩子等等。

Lifestyle can really throw a monkey-wrench in the process, no matter how dedicated the sleeper wants to be: no amount of iron will can compensate for a hectic work-schedule, or kids, etc.

youdao

生活方式总是会让这个过程进行得不那么顺利，不管实践者怎样努力，再多铁一般的意志也弥补不了一个繁忙的工作日程或者照顾孩子等等。

Lifestyle can really throw a monkey-wrench in the process, no matter how dedicated the sleeper wants to be: no amount of iron will can compensate for a hectic work-schedule, or kids, etc.

youdao