油层的非均质性对油藏开采效果影响甚大。
Heterogeneity of a reservoir bed has a rather great effect on its exploitation.
《国际编目原则声明（草案）》的通过，对MARC影响甚大。
Statement of International Cataloguing Principles (Draft) has a great influence upon MARC.
《国际编目原则声明（草案）》的通过，对MARC影响甚大。
Statement of International Cataloguing Principles (Draft) has a great influence upon MARC.
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