He struggled with the problem of how to treat the gravitational pull of the earth on terrestrial objects.
他就曾为如何处理地球对地上物体的吸引力的问题而伤脑筋。
A major problem faced by terrestrial organisms is the loss of a continuous supply of water necessary to keep tissue surfaces moist.
陆生动物的水保持陆生动物面对的主要问题是连续地失水，这是供应到组织表面维持潮湿所必需的水。
Soil polluted by crude oil, covering about 0.52% terrestrial land area of China, has become a serious environmental problem.
在我国原油污染土壤问题日益严重，污染面积约占国土面积的0.52%。
Soil polluted by crude oil, covering about 0.52% terrestrial land area of China, has become a serious environmental problem.
在我国原油污染土壤问题日益严重，污染面积约占国土面积的0.52%。
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