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XMLAGG - column function that groups several elements within a parent element.

XMLAGG——将几个元素组成一个父元素的列函数。

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After the scattering boundary conditions were set up, the scattering pressure expression of the solid sphere in the focusing area was derived by column function addition theorem.

建立了散射边界条件，并运用柱函数的加法定理，通过理论推导得到了聚焦区内刚性球形微粒的散射声压表达式。

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The number of the old requirement, which was moved to the new Function, is shown in the next column of the spreadsheet.

WHITEHOUSE: Core Requirement Updates Description of Requirement Spreadsheets | The White House