In addition, it is also easy to exploit marine ecosystems.

另外, 它的开采也极易破坏海洋生态系统.

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The circulation adds energy to the marine ecosystems and moves nutrients around.

这种循环使海洋生态系统增加了能量,从而使营养物质向四周移动.

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This circulation adds energy to the marine ecosystems and moves nutrients around.

这种循环为海洋生态系统增加了能量从而使营养物质四处运动.

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Coral reefs are the foundation of many marine ecosystems - and they are in danger.

珊瑚礁是很多海洋生态系统的基础,然而,目前它们正面临着危险.

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