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The origin of life is still a poorly understood process, but it is thought to have occurred about 3.9 to 3.5 billion years ago during the hadean or archean eons on a primordial earth that had a substantially different environment than is found at present.

对于生命起源，我们仍知之甚少，但是据猜测生命起源于距今35亿年到39亿年前，原始地球的冥古代或太古代，当时地球上的环境跟现在大不相同。

Recently archeological excavations revealed the ruins of an ancient city dating back to 5000 years ago.

最近，考古工作者在那儿发现了一座五千年古城的遗迹。

An important law was first discovered by Archimedes, who was a scientist who died over 2,000 years ago.

阿基米德首先发现了一个重要的定律。阿基米德是一个科学家，死于2000多年前。

Firstbuiltsome 600 years ago, it is the largestand most complete existing architectural complex of ancient royal palace in the world.

故宫始建于 600 年前，是世界上现存最大最完整的古代宫殿建筑群。

First built some 600 years ago, it is the largest and most complete existing architectural complex of ancient royal palace in the world.

故宫始建于600年前，是世界上现存最大最完整的古代宫殿建筑群。

Raskin was programming up until he could no longer type, about a week ago, says his 21-year-old son, Aza Raskin, who worked with him on Archy for six years."Jef largely ignored being sick," he says."He thought it was more important to keep his work going. The only thing that happened was he worked harder if that's possible."

去世之前的半年时间中，拉斯金先生将他的全部精力投入到一款名为Archy的操作系统软件研发中，根据项目中的合作伙伴提供的信息，此款操作系统将会大大提高用户易用性，并且有望将电脑用户沟通技术引入一个新的纪元。

His function a moment ago saw besides everybody, still can do search of a statistic, and this search is according to your area the area that visits on the graph does a search, the result that can come out the search next comes out in the mark on the map, know where the place is so.

他的功能除了大家刚才看到的，还可以做一个统计搜索，而且这个搜索是根据你地图上看的区域做一个搜索，然后能够把搜索出来的结果在地图上标出来，这样就知道地方在哪儿。

Ten years ago, this thought came into the mind of Arian de Bondt, a Dutch engineer.

10年前，一位德国工程师Arian de Bondt就有了这样的想法。

Just two years ago, he was putting in marathon days at Arista.

就在两年前，他还在Arista度日如年。

Reporter Just two years ago, he was putting in marathon days at Arista.

记者 就在两年前，他还在Arista度日如年。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。