短語詞組短語Protraction pattern 拖延型式遲滯protraction movement 前伸運(yùn)動(dòng)protraction ? 伸長(zhǎng)maxillary protraction 前方牽引;上頜前牽引;上頜前方牽引;前牽引Low Protraction 低伸長(zhǎng)protraction calculation 伸長(zhǎng)量測(cè)算protraction E 伸長(zhǎng)protraction dose 延長(zhǎng)劑量;[核]遷延劑量;劑量延長(zhǎng)Rear Protraction 后伸 返回 protraction