If you've been lucky enough to look at a piece of rock art close up, you'll know it's an experience that makes you wonder about the passage of time and our own history.
如果你有幸近距离观看一件岩石艺术品，你会知道这是一种让你对时间流逝和历史感到好奇的经历。
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Rubbing his hands together happily, he mumbled half to himself, "This piece of wood has come in the nick of time."