To illustrate the Expression Problem, Wadler's paper USES the idea of a table that has types as rows and functions as columns.

为说明表达式问题，Wadler的文章使用了表的概念，其中类型为行，函数为列。

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Another problem is the use of implicit types.

另一个问题在于对隐式类型的使用。

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JIT debugging is very different from other types of problem determination techniques.

JIT调试与其他类型的问题判断技术有很大的不同。

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Officers have said the main problem on Merseyside is with pit-bull terrier types, but all illegal dogs will be collected.

BBC: NEWS | UK | England | Merseyside | Merseyside's dogs amnesty begins

The problem, by now, is that the GOP has become heavily-infested by two conservative types: the whacko-religionists and the ethno-nationalists.

FORBES: What The Republicans Must Do To Rebuild, And Attract Future Voters

The problem with being too happy about a "good year" (and here the title-or-bust types are on to something) is that next year, the standard for "good" ratchets up, gets a little harder.

WSJ: Five Thoughts on the Knicks