它们只在地图尺寸和凹凸的程度上有所不同。
They only have differences in map sizes and grades of the bump.
然而标准尺寸和橡胶圈的松紧程度因制造商而有所不同。
The standard sizes and the tightness of the elastic rings, however, vary by manufacturer.
PTSD患者，总是表现出偏高的反应，即使圈的尺寸大小缩小到安全信号的程度。
The PTSD patients, however, showed elevated responses even as the circles declined in size toward the safety end of the continuum.
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