约1078年由征服者威廉一世开始在罗马城墙内侧建造一座中央城楼「白塔」（因以石灰岩建造而得名）。

The central keep or donjon known as the white tower because of its limestone was begun c. 1078by william I the conqueror inside the roman city wall.

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实验材料是在中央注视点两侧各安排三个方框，分别为外侧方框、中间方框和内侧方框。

In the experiment, three boxes were placed on both sides of the central fixation, which be called outside box, center box and inside box.

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内侧径路经间脑室周、中脑中央灰质、第四脑室底、孤束核—迷走背核复合体、延髓与脊髓中央管周下行。

The other bundle from PVN, the medial, descends through diencephalic periventricular gray, periaqueductal gray, floor of ventricle IV, SVC and medullary-spinal central gray.

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