Soil liquefaction is also a major design issue for large structures such as mine tailings impoundments and earth dams.
因此，判定地基土液化可能性是抗震勘察设计中的一个重大课题。
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New routings of long-distance bird migrations, brought about by new man-made water impoundments, represent an important yet still untested risk of introduction of arboviruses into new areas.