Such models are important for understanding the integrated Earth system and aiding policymakers considering ways to reduce pollution.
此类模型对于理解综合的地球系统意义重要，也有助于决策者考虑减少污染的方式。
Digital Earth "is a great scientific system which integrated science with technology and engineering."
“数字地球”是集科学、技术和工程于一体的一项宏伟的科学体系。
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