pot-hole比喻？

共同研习

This flaw in the design plan leads to a reassessment, and an adjustment to add a few pot-holes or obstacles along the way.

粗略看来，pot-hole似乎是某种比喻，但是词典上查不到比喻的用法。这句话怎么翻比较好？

弹钢琴

你也不给语境，单放这么一句话，谁能知道什么意思

共同研习

A pothole is a minor difficulty encountered along a reasonably smooth path (a pothole is where part of the road surface has a hole in it, so it’s bumpy when you drive over it).

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这里有讨论，网友们的意见是，pothole比较minor。
我本来想用坎坷来翻译，但感觉坎坷这词太重了，不够minor。

共同研习

我暂时决定翻译为 不平坦。