The principal structural element in magnetism is the domain .

在磁学中的主要结构单元是磁畴。

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A stone wall with a water element is introduced opposite the main entry and extends this principal axis.

一堵带有水设计元素的石墙被引入，正对着主入口，将主轴线扩展开。

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The quality of college application essays, for both home and overseas students, is used by American universities as a principal element of the scholarship decision-making process.

对于国内外的申请者而言，申请文书的质量是决定申请美国大学奖学金成功与否的关键因素。

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There's clearly been a profound change in the nature of guerilla warfare and a principal element in that change is technological.

NPR: High-Tech Weapons Change Guerrilla Warfare

While I am a strong believer in the flywheel principal as a general practice, there are also times when radical change is in fact the critical element needed to move a company to the next level of success.

FORBES: Successful Leadership Requires The Right Order Of Operation