要获得更多以上软件的信息，请看参考资料部分。
For more information on the above software, please see the Resources section.
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.
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