Research into cancer rates of one of the largest groups of mobile phone users ever studied found no difference compared with people who did not use them.
对最大手机用户群体之一的癌症发病率的调查研究显示，手机用户和非手机用户之间在罹患癌症的风险上并没有什么区别。
Methods: the ATQ fraction of test group was compared with that of control group, and difference between them and its degree were observed.
方法：将检验组与对照组自动思维问卷(atq)的分数进行比较，观察有无差异和差异的程度。
The kinematic parameters of these segments were calculated and compared difference between them.
计算各个节段运动学参数及相关参数间的差异。
The kinematic parameters of these segments were calculated and compared difference between them.
计算各个节段运动学参数及相关参数间的差异。
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