Humans are asymmetric animals. Early in our embryonic development, the heart turns to the left. The liver develops on the right. The left and right lungs have distinct structure.
人类是不对称的动物，在我们胚胎发育的早期，心脏就转向了左边，肺则往右长，而且左、右肺具有完全不同的结构。
Figure 10 illustrates how the location structure changes as we traverse the tree, here going down (always to the first left child), then right, then down.
图10展示了在我们遍历树时位置结构发生了怎样的变化，在这里向下(始终下移至左侧第一个子节点)，随后向右，然后再向下。
The rock cropping on the left may appear from this Angle like a human head, but the more famous rock structure is on the far right and known as Pulpit rock.
左边被裁切掉一半的岩石从这个角度看象人类的脑袋，而更有名的是最右边的岩石结构被称作讲坛石的。
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