For M. phoebe, to decrease grazing, especially its effects on the source population during the post-hibernating larval group stage, is crucial for its population restoration and growth.

在春季减少源斑块内的放牧，对于以源-汇集合种群形式存在的大网蛱蝶种群恢复和增长十分必要；

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"It is crucial that national authorities do not rush to give information on source of infection which is not proven by bacteriological analysis, as this spreads unjustified fears in the population all over Europe, and creates problems for our food producers selling products in the EU and outside of the EU."

VOA: special.2011.06.10

Community media are a major source of news for most of the population and contribute to the well-being and development of ordinary citizens.

UNESCO: MEDIA SERVICES

Not only do games help Facebook keep a large segment of its population coming back, they are also an increasingly important source of revenue.

FORBES: Launching Platform-Wide Changes, Facebook Seeks to Up Its Social Game

"It signals to us that the source (of the caffeine) really isn't the high population centers, possibly because they are on wastewater treatment plants, " Granek told CNN.

CNN: Researchers find caffeine in waters off Oregon