Extonn.埃克斯顿EXTabbr.扩展（=extension）abbr.外面的；外部的（=exterior）abbr.额外的（=extra）extermal diaphragm外光阑extermination camp灭绝营extremal statistic极值统计量extrdural pressure硬膜外压extensor mechanism伸肌结构, 伸肌装置extensile approach扩张进入法extremitas medialis内侧端extruding laminator挤压层合机extensibility meter延伸率计extremal hypotheses终极假说