The exact velocity is vital to layout design,exact orientation of the geologic target underground,structure interpretation and reservoir forecast,etc.In structure mapping,we should establish refined velocity field and apply variable-velocity mapping to improve the precision of the structure map,thus providing a basis for oil-gas exploration.
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In this case, you can use a mapping to convert the message from one structure to another.
这种情况下，您可以使用一个映射来将消息从一种结构转换为另一种结构。
In this case a mapping can be used to convert the message from one structure to another.
在这种情况下，可以使用映射将消息从一个结构转换为另一个结构。
For each running process, the mapping between virtual and physical address is maintained in a data structure called the page table.
对于每个正在运行的进程，虚拟地址与物理地址之间的映射是在一个称作页表的数据结构中维护的。
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