The motivation for introducing motion preservation procedures in the neck is primarily to protect the patients from developing symptomatic adjacent disc disease.
采用保存颈部活动度的方法，其目的主要是防止这些患者邻近椎间盘疾病症状的进展。
There are many factors to motivate the degree of prototypicality of patient object and one of them is motivation of verb, including the degree of motion and frequency of verb in discourse.
制约受事宾语典型性强弱的因素很多，而动词的制约是其中很重要的一个方面，具体表现在动性程度的高低和动词在口语或语篇中出现频率的高低。
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