Programs using yacc, but not lex, are rarer.

But the authors of the new study found that documented extinctions are far rarer in the ocean.

但这项新研究的作者发现，海洋动物灭绝的文档记录则要罕见许多。

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It is rarer to find a middle-income state in which law and order once existed but later failed.

而那些法律法规曾经比较完善的中等收入国家，后来法律法规却不再适用的，却很少见。

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Theme items are much rarer.

复项主位更为少见。

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However, there have little research from the production management angle; especially researches on production planning of mass customization are rarer.

但是，从生产管理角度进行的研究较少，尤其是对大规模定制的生产计划的研究更为罕见。

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Of course, the belief, I am Napoleon is a much rarer belief.

当然了，我是拿破仑这个信念更罕见。

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Many researches about intonation are traditional and researches about intonation function in the discourse are even rarer.

目前关于英语语调的研究多为传统的研究，对于英语语调在语篇中的功能研究更是凤毛鳞角。

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Then a biopsy revealed he had a rarer form still, one that could be surgically removed.

接下来的胰岛穿刺活检组织病理结果显示，他的癌虽更罕见，但可以通过手术切除。

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Moral courage is a rarer commodity than bravery in battle or great intelligence.

道德勇气是一个伟大的智慧罕见或商品比在战斗中英勇。

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Thanks to rising agricultural productivity, lean years are rarer all over the globe.

由于农业增产，全球的不景气日子更加罕见了。

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The rarer and more valuable those services are, the better off you'll be.

你的服务越稀有越有价值，你赚的就会越多。

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With the increase of mobile users, the wireless resource available becomes rarer and rarer.

随着移动用户的大量增加，空中资源日趋紧张。

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His prediction, therefore, was that better emotional memory would be associated with the rarer version.

他因此推测情绪记忆更牢固和较少见的变体有关。

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That sort of team poaching is common in investment banking but rarer in academic research.

这种挖走人家整个团队的做法在投资银行界司空见惯，但是在学术研究界却不多见。

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It is rarer for coaches to live apart from their family.

但是教练和他们的家人分居就少见了。

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But it only offered low protection against one rarer strain, which the authors say needs more investigation.

但是它对一种更罕见的毒株的防御作用较低。科学家说对这种毒株需要更多的研究。

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Attacks are rare; deaths are rarer ( six worldwide last year).

鲨鱼袭击很少见，而被鲨鱼吃掉更是少之又少（去年共有6起）。

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In a much rarer case, your application could need to be able to receive secure email.

在很少的情形中，您的应用程序可能需要能够接收安全电子邮件。

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That seems to be an even rarer talent and accomplishment.

而这似乎才是更难得的才能和成就。

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Direct evidence on wage levels is rarer still.

显示薪资水平的直接证据就更少见了。

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An Empirical Study of compounding the problem of criminal cases in rural areas is rarer.

另外，从实证角度研究农村刑事案件的私了的文章也非常少见。

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