主要有前进法(forward regression)、 后退法 ( backward regression )及逐步法(stepwise regression),以后者最为常用,但其得到的回归方程不一定是“最优”的,而只是..
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逐步后退法 step-back technique
前倾后退法 Approacdhingandrecdeing
顺序后退法 Sequential Backward Selection ; SBS
广义顺序后退法 GeneralizedSequential Backward Selection ; GSBS
推广为广义顺序后退法 GeneralizedSequential Backward Selection ; GSBS
被动逐步后退法 passive step-back technique ; step-back technique
和顺序后退法 SequentialBackwardSelection
改良逐步后退法 modified step-back technique
后退焊接法 retrocession welding method
逐步后退法;弯曲根管;根管预备;根管充填。
Step-back technique; Curving root canal; root canal preparation; root canal condensation.
不锈钢K锉组(SS)采用常规手用不锈钢K锉、逐步后退法预备根管。
The third group were prepared using the stainless steel hand K-files with the step-down technique(SS group).
法提克的妈妈向后退了几步,端详了下那陌生人—此时她的怒容竟转变为满脸的惊喜。
But when his mother stepped back and looked at the stranger, her anger was changed to surprise.
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