人类文明进程可以分为四个时代：工具时代、农业时代、工业时代和知识时代。
There are four stages in the process of human civilization progress, which are the tool age, the agriculture age, the industry age and the knowledge age.
这些物品必须覆盖整个世界，从一个烹饪锅到一艘金色的帆船，从石器时代的工具到一张信用卡。
The objects had to cover the whole world, from a cooking pot to a golden galleon, from a tool in the Stone Age to a credit card.
在这个信息时代，我们应该熟练使用互联网这个搜索工具。
In this age of information, we should be experienced in using the Internet as a search tool.
应用推荐