These tools were useful for a wider range of tasks than the Oldowan ones.
这些工具可以用于比奥尔·德沃文化内容更广泛的任务之中。
The style of stone tools called the Oldowan appeared 2.5 million years ago and stayed unchanged for more than a million years.
叫做奥尔·德沃的石器风格在二百五十万年轻出现，并在一百万多年里保持不变。
On the northwest shoreline of Kenya's Lake Turkana, at a site known as Kokiselei, researchers previously found both Oldowan and Acheulian tool types in the same 1.76-million-year-old sediments.
在肯尼亚图尔卡纳湖的西北湖岸线上一个叫做Kokiselei的地方，研究人员此前在176万年前同一沉积层里发现了奥尔德沃和阿舍利工具遗迹。
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