1.I have done a great deal in the last few eks.
在过去的几个星期里，我做了很多事情。注意。
2.S ev earl we eks aft er our son began his freshman year at Alma Coll eg e in Michigan, my husband and Id ecid ed to visit him.
我们的儿子是密歇根州阿尔马大学的新生，开学几个星期之后，我和丈夫决定去看看他。
3.Here we establish the models of semantic web of extension knowledge space(SWEKS)and extension knowledge grid(EKG)based on EKS.
这一部分进一步建立可拓知识空间语义网、可拓知识网格和可拓知识网格服务，并给出实例和相关的分析讨论。