Consider humans as part of these ecosystems, you've probably heard about water shortages or restrictions on how much water you can use, especially in the summer time, in recent years.

考虑到人类是这些生态系统的一部分，你可能听说过，水资源短缺可能会限制你可以使用多少水，特别是近些年夏天的时候，

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Industry insiders say increased demand due to recent blizzards was partly to blame for the shortages. The country's poor natural gas reserves also are part of the cause.

业内人士称，该现象部分是由于近日暴雪导致各地天然气需求剧增，另一部分原因是国家缺乏相应的天然气储备机制。

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The shortages are especially acute in the National Guard, which has only about half the equipment it needs, and part of that is in Iraq.

国民警卫队的短缺特别突出，只有所需装备的大约一半，而且一部分还在伊拉克。

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When we have shortages in one part of the country of beds or intensive-care beds we can ensure that a network of services provides them in another part of the country."

VOA: standard.2009.09.24

The policy change is designed in part to avoid shortages of the vaccine, says Rodney E.

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Some of the reasons cited are shortages of key components in part due to the Japanese quake and unstable performance of Android Honeycomb operating system, which Google specifically developed for tablets.

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Mr Baber will tell councillors on the Health Scrutiny committee the PCH was working hard to tackle the staff shortages, that beds are only part of the picture and it is delivering the required levels of patient care.

BBC: Councillors hear of bed shortages at community hospitals