The distinction between geophysical and geological branches of earth science is not clear - cut.
地质和地球物理这两个地球科学分支的差别并不泾渭分明。
The distinction between geophysical and geological branches of earth science is not clear-cut.
地质和地球物理这两个地球科学分支的差别并不泾渭分明。
The distinction between geophysical and geological branches of earth science is not clear-cut.
地质和地球物理这两个地球科学分支的差别并不泾渭分明。
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