A lttle more off the bac (sdes/top).
后面（两边、头顶）请再剪一些。
Objective: To analyze the features of the pre-hospital sudden death events (SDEs) and its regularities.
目的：系统分析院前猝死事件的发生特点及其规律。
Objective: To systemically analyse the features of the prehospital sudden death events (SDEs) and its regularities.
目的：系统分析院前猝死事件的发生特点及其规律。
In this paper we present the phylogeny of storage and management of spatial data and compare shortcoming and virtue and then especially analyses the SDEs work.
文章首先叙述了空间数据存储管理的历程，并比较了各阶段的优缺点，然后重点分析了空间数据引擎(SDE)这一关键技术。
In this paper we present the phylogeny of storage and management of spatial data and compare shortcoming and virtue and then especially analyses the SDEs work.
文章首先叙述了空间数据存储管理的历程，并比较了各阶段的优缺点，然后重点分析了空间数据引擎(SDE)这一关键技术。
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