Occasionally one can determine whether stone tools were used in the right hand or the left, and it is even possible to assess how far back this feature can be traced.
偶尔，人们可以确定石器是用在右手还是左手上，甚至可以评估这种特征可以追溯到多远以前。
People used simple tools to dig the canal, completely by hand.
人们使用简单工具来挖这条水渠，纯粹靠手完工。
Metrics collected automatically from the development and management tools used by the teams provides accurate information about the situation at hand.
从团队使用的开发和管理工具自动收集来的度量标准提供了关于手边情况的准确信息。
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