A castle is a type of fortified(加固的)structure 61 (build) in Europe and the Middle East during the Middle Ages. This is different from a palace 62 is not fortified, though there are a large number of 63 (similarity) among these types of construction. Since then usage of the term 64 (apply) to diverse structures.
The European castles 65 (origin) in the 9th and 10th centuries, resulting in its land divided among nobles, who built castles to control the area 66 (surround) them. The castles were also 67 (defense) structures. Although army uses are often emphasized in castle studies, the structures also served 68 centers of administration and symbols of power. Urban castles were 69 (usual) used to control the local people and important travel routes, 70 rural castles were often built near farmland.
61. built 62. which/that 63. similarities 64. has been applied
65. originated 66. surrounding 67. defensive 68. as
69. usually 70. and/while