The mantis shrimps, found on the Great Barrier Reef in Australia, have the most complex vision systems known to science, researchers at Bristol University have found.

英国布里斯托大学的研究者发现，生活在澳大利亚大堡礁海域的螳螂虾的视觉系统是科学界迄今所知的视觉系统中最复杂的。

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It may even be that the restrictions of a primitive language are a barrier to creating complex thoughts.

一种原始语言的局限性，可能正是其创造复杂思想的障碍。

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Of course, the first two factors are nothing new -- graphical frameworks are complex by nature and adding business functionality to a GUI application has always posed a barrier to testing.

当然，前两个原因并不新鲜 —— 图形框架本来就很复杂，而且向 GUI 应用程序添加业务功能总是会给测试造成麻烦。

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The experience of Turin's Lingotto, a complex that suffers from inadequate public transport, underlines how local planning rules can be another barrier to success in regeneration schemes.

ECONOMIST: Urban regeneration