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。
2
How to play: Tilt your device left and right to move the stone platform. Clear your mind and keep your hand steady as you balance the stack.
如何玩：倾斜装置左，右移动石台上。清除您的头脑，保持稳定，因为你的手你的平衡堆栈。
3
He then saw the great aqueducts, those stone phantoms which he had before remarked, only then they were on the right hand, now they were on the left.