《英汉医学词典》class interval lunch 课间加餐 class-interval lunch: 课间加餐class interval: 标度分类间隔类区间; 标度分组间隔; 课间休息; 组间距; 组区间;组距interval class: 组区间magnitude of class interval: 组距大小midvalue of class interval: 组中值下载手机词典可随时随地查词查翻译