此方法为排料口宽度调整设计提供了可靠参考依据。
This method can provide a reliable reference basis for the design of adjustment to the width of discharge opening.
目的：探讨彩色多普勒过返流口宽度在估测二尖瓣返流程度中的作用。
Objective: To explore the roles of color Doppler vena contracta in the evaluation of mitral regurgitation grading.
那么如何在两组不同的CSS规则之间进行选择和应用，基于窗体的宽度，而不是视口宽度本身？
So how can I choose and apply between two different sets of CSS rules, based on the width available to the form, instead of the viewport width itself?
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