The whole system is a B / S framework having a good human-computer interface and can be used at anytime and anywhere.

整个系统为B/S框架，具有良好的人机交互界面、使用不受时间空间限制等特征。

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They can ask what was going on anywhere in the world in, say, science or literature during the 4th century B.

比如说，他们可以询问公元前四世纪世界上的科学和文学。

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They can ask what was going on anywhere in the world in, say, science or literature during the 4th century B.

比如说，他们可以询问公元前四世纪世界上的科学和文学。

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