We are frequently confronted with statements about the alarming rate of loss of language diversity.

我们经常听到关于语言多元性快速丧失的言论。

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So it is a more wise choice to increase the transmission rate and optimize the time slot block number on the condition of keeping the full diversity order in STBC design.

在保证满分集度的前提下，尽可能提高码率，并优化时延分组数，才是多发射天线构架复信号空时分组码设计的更明智的选择。

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Whereas the non-orthogonal space-time block codes which obtain higher transmission rate at the cost of orthogonality and partial diversity gain may degrade the performance.

而以牺牲正交性和部分分集增益为代价来获得更高传输速率的非正交空时分组码又会使误码性能降低。

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But it acquired its key global pledge during the Johannesburg summit of 2002, when governments agreed to achieve a "significant reduction" in the rate of biological diversity loss by 2010.

BBC: World's biodiversity 'crisis' needs action, says UN

Plant diversity is being destroyed at a greater rate than ever before and much of this is due to habitat loss through changes in land use.

CNN: STORY HIGHLIGHTS