Wolfram|Alpha
Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.与其他搜索引擎不同，WolframAlpha其实是一个计算知识引擎，它真正的创新之处在于能够马上理解问题，并给出答案。它可以进行各种算术，还有数据分析，物理，艺术等等各个行业的查询。
点击进入 - 2022-09-25 - 收藏
English Language (ESL) Learning Online
Resources to learn the English language for ESL, EFL, ESOL, and EAP students and teachers. Browse our Glossary of Terms, join our busy forums, download our free language software, read our articles and teacher handouts, and find useful links and information on English here.
点击进入 - 2015-10-25 - 收藏