If, by contrast, everything was in a pile on the main floor, it would significantly reduce the usefulness of the library by making the search for materials virtually impossible.

如果采用相反的方式，将所有的东西都堆在一个大房间里，由于几乎不能进行资料搜索，因此会大幅度降低图书馆的有用性。

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Even if these findings lead to the development of an earthquake warning system, Ian Main, a seismologist at the University of Edinburgh, UK, warns that its usefulness will be limited.

英国爱丁堡大学的地震学家伊恩·麦恩(Ian Main)提醒道，即使地震预警系统因这些发现而得以建立起来，其实用性仍是有限的。

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The test developers 'main task is to find an optimal balance among them so as to guarantee the usefulness of language tests.

作为试题的设计者，其主要任务就是要寻找这六个方面的最佳平衡点，保证其编写的试题项目起到预期的作用。

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And for me, this became the main usefulness of the keyboard: remapping any key on the regular keyboard and the DATK keys to other keyboard functions.

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Along with mistaken egalitarian assumptions, governments should also ditch another misconception: the utilitarian notion that universities' main merit is their economic usefulness.

ECONOMIST: Universities

Mr Yeltsin's main innovation has been his pragmatism, and its usefulness is far from exhausted.

ECONOMIST: A mission statement for Russia?