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.
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.
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.
如图纸无特殊要求，衬砌背后之流水应排入隧道内侧排水沟或中央排水管内。
When there are no particular requirements on the Drawings, water flow behind the lining shall all be drained into the inner side ditch of the tunnel.
如图纸无特殊要求，衬砌背后之流水应排入隧道内侧排水沟或中央排水管内。
When there are no particular requirements on the Drawings, water flow behind the lining shall all be drained into the inner side ditch of the tunnel.
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