前提：Centos 5.11 + Eclipse 安装XWT时，对EClipse的经验
Cannot complete the install because one or more required items could not be found.
Software being installed: Eclipse XWT 1.3.1.I20171018-2059 (org.eclipse.xwt.feature.feature.group 1.3.1.I20171018-2059)
Missing requirement: XWT PDE Plug-in 1.3.1.I20171018-2059 (org.eclipse.xwt.pde 1.3.1.I20171018-2059) requires ‘bundle org.eclipse.core.runtime 3.8.0’ but it could not be found
Cannot satisfy dependency:
From: Eclipse XWT 1.3.1.I20171018-2059 (org.eclipse.xwt.feature.feature.group 1.3.1.I20171018-2059)
To: org.eclipse.xwt.pde [1.3.1.I20171018-2059]
安装XWT时出现缺少其它插件的提示，
首先找到版本号，通过：Missing requirement: XWT PDE Plug-in 1.3.1.I20171018-2059
“20171018”指年月日，2017年eclipse的发行日期有个版本代号：Oxygen和版本数字4.7。
https://archive.eclipse.org/eclipse/downloads/drops4/R-4.7-201706120950/#PDESDK
Missing requirement: XWT PDE Plug-in 1.3.1.I20171018-2059
这行信息中的2017前是英文字母大写的i
pde runtime binary 和 pde sdk 的区别
