为更高马力设计的机器在减速中是效率递减的，特别是减速至20节以下。

There are diminishing returns in slow steaming with machinery designed to operate at higher outputs - particularly when reducing speeds to below 20 knots.

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这里面临的一个问题在于，计算机操作系统已经实现了一定的成熟度和效率，我们甚至可以说，对操作系统的使用已经达到了收益递减点（Point of Diminishing Returns）。

Part of what’s going here is that the computer operating system has achieved a level of maturity and efficiency. You could even say that work on the OS has reached a point of diminishing returns.

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不断地检查 if x in otherlist 会导致效率成 big-O 式几何级数递减；在两个固定排序的列表之间进行平行匹配的效率要高得多。

Constantly asking if x in otherlist runs into geometric big-O inefficiencies; marching in parallel between two stably-sorted lists is more efficient. For example

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