deviation
/ˌdi:vɪˈeɪʃn; ˌdivɪ`eʃən/ n
~ (from sth)
1
(a) [U] not following the normal or expected course, plan, etc; deviating 偏离正常的或原定的路线、 计划等; 偏向; 偏差
There was little deviation from his usual routine. 他没有什麽反常的举动.
sexual deviation 性变态行为.
(b) [C] instance of this 偏差; 逸出常轨
a deviation from the rules 违背规则.
2 [U] (politics 政) moving away from the beliefs held by the group to which one belongs 背离自己所属集团的信条; 背盟
Party ideologists accused her of deviation. 党内理论家谴责她背离了党的信条.
3 [C] difference between a numerical value and a norm or average 偏差; 离差
a compass deviation of 5, ie from true north 罗盘自差5度（相对於正北而言）.