Lucy knows how to add and substract but fractions have her up a stump.
做加减法，露西不成问题，可分数却难倒了她。
The invention provides a magnetic element capable of reducing configuration area relative to a mounting substract and realizing high density mounting.
本发明提供一种减小针对安装衬底的配置面积、可实现高密度安装的磁性元件。
Objective:To evaluate the clinical value of Digital substract angiography (DSA) and endovascular stent placement (ES) in the diagnosis and treatment of aortic dissection.
目的：探讨数字减影血管造影（DSA）和经皮带膜内支架置入术（ES）在主动脉夹层诊断和治疗中的应用价值。
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