Lex and yacc are a matched pair of tools.

lex和yacc是一对配对工具。

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Early central Javanese sculptures with established provenances are extremely rare; it is rarer still to see a matched pair of statues in such good condition.

能找到确切发祥地的早期爪哇雕塑非常罕有，这样凑齐一对并且状况良好的就更为罕有了。

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Results The result between pre-and post-soaks was compared with matched pair t test. There was significant difference between groups 1 and 2(P<0.01), but not between group 3 and control group(P>0.05).

结果实验前后各组均数间进行配对检验，结果1、2组间在处理前后差异有显著性（P<0.01），实验3组与对照组间在处理前后差异无显著性（P>0.05）；

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For whatever reason, I went through this latest New England winter without a matched pair of gloves.

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Turns out they were a matched pair of gabby golf-bloggers who, once prompted, never again remained silent.

WSJ: Joys and Perils of the Single Walk-On Golfer | Golf Journal

"What is actually most remarkable is the finding of a matched pair together without the skull to hold them together, " he said.

BBC: The tusks