It was a period to which, if error was natural, so was the boyish faculty of hoping, believing and rejoicing.
那是这样的一段时期：如果犯错是自然的，那么那种孩子气的希望、信仰和快乐也是自然的。
2
One of the reasons the site is so valuable to scientists is that it opens a window on the natural world just prior to a period of great, and puzzling, change.
He asked for some advice from people within our department on how to contain infectious disease, during the period following this kind of natural disaster.