Many people are playing a role in saving the earth on Earth Day.
许多人都能在地球日为拯救地球奉献一份力量。
With the rapid development of remote sensing technology, remotely sensed data are playing more and more significant role in many fields, such as urban planning, geoscience, digital earth etc.
随着遥感技术的飞速发展，遥感数据成为城市规划、地球科学研究、数字地球等重大科学研究和工程建设的重要数据源。
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