直到大约300年以前，世界各地的经济都多以农业为主，大部分的价值都由土地创造。
Up until about 300 years ago, economies across the world were mainly agricultural, with most of the value produced from the land.
很多以前大部分由妇女完成的家务活——从家庭采购、准备三餐到义务工作——现在仍然需要有人来完成。
Many in-home jobs that used to be done primarily by women - ranging from family shopping to preparing meals to doing voluntary work - still need to be done by someone.
民意调查机构阿伦斯巴赫（Allensbach）的瑞内特•柯克（Renate Köcher）表示，默克尔夫人正在经历就任五年多以来“从未有过的最艰难的时期”，原因部分归咎于此。
Partly because of it, Mrs Merkel is going through her "roughest patch so far" in more than five years in office, says Renate Köcher of Allensbach, a pollster.
自动答疑是现代远程教学系统中一个重要组成部分，然而目前的自动答疑系统大多以关键词匹配为基础，忽视了关键词本身所含的语义信息、查询效率和结果不能满足用户的需要。
The question answer system is the important part of the Distant Education. However mostly the current system is just based on matching and ignores the semantic information of the keywords itself.
自动答疑是现代远程教学系统中一个重要组成部分，然而目前的自动答疑系统大多以关键词匹配为基础，忽视了关键词本身所含的语义信息、查询效率和结果不能满足用户的需要。
The question answer system is the important part of the Distant Education. However mostly the current system is just based on matching and ignores the semantic information of the keywords itself.
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