In March NeuroFocus, another California-based outfit, demonstrated what it claims is the first medical-grade dry EEG headset.
三月，总部位于加州的NeuroFocus展示了他们号称是第一台医用级的EEG头套。
No ankle demonstrated progression of arthritis on the basis of the radiographic grade.
无踝关节被证实进展为基于影像学分级的关节炎。
The results indicated: 1)Significant grade differences of teacher-student relationship were demonstrated, but there was no significant difference between gender and age.
研究结果表明：（1）初中生在师生关系知觉上存在显著的年级差异，但并不存在性别和年龄差异；
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