In a matter of weeks, these drugs reduce the number of viruses per millilitre of infected blood from millions to less than 50.

仅需几周时间，这些药物就可将被感染者每毫升血液的艾滋病毒数量由数百万个减少到50个以内。

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In arid and semiarid regions, on the other hand, the small number of lakes and the great distances between them reduce the possibilities for correlation.

另一方面，在干旱和半干旱地区，湖泊数量少，湖泊之间距离远，减少了相互关联的可能性。

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They hope to reduce both the number of components needed in a construction job and their weight—by replacing solid supports with hollow tubes, for example.

他们希望减少建筑工作所需的部件数量和重量，例如，用空心管代替实心支架。

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The delegates in Rome promised to continue efforts to reduce by half the number of hungry people by two thousand fifteen.

VOA: special.2009.11.23

One of the Millennium Development Goals is to reduce by half the number of people living in extreme poverty by twenty fifteen.

VOA: special.2010.04.26

It helps reduce the number of high school drop-outs in Los Angeles and the San Francisco area.

VOA: special.2011.03.02

Mexico City Mayor Miguel Angel Mancera said his government would launch a new program to spay and neuter dogs in order to reduce the number of animals in the street, sending 25 mobile surgical units to neighborhoods where residents would be encouraged to take advantage of free sterilization for their pets.

NPR: Officials: Possible 5th Killing By Mexico Dog Pack

Nor are cuts going to help: take demand out of the economy and you reduce the number in employment.

FORBES: Demand goes round the U-bend

The American College of Obstetricians and Gynecologists recommended last year that oral contraceptives be sold over the counter in an effort to reduce the number of unintended pregnancies in the United States.

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