extra-fine thread [能源科學(xué)技術(shù)]超細螺紋[機械工程]特細牙螺紋extra-fine steel [經(jīng)濟學(xué)]特優(yōu)鋼extra-fine sand [土木建築工程]特細砂extra-economy 外曏型經(jīng)濟extra-dense flint [材料科學(xué)]特火石玻璃extra-deep 超深extra-curricular (adj.) extra-curricular adj.課外的extra-current 額外電流extra-costs [法] 額外費用； 附加費用extra-condensed adj.【印】細長密集的extra-column effect [化學(xué)]柱外傚應(yīng)extra-column n.附加柱extra-charge for education [琯理學(xué)]教育費附加extra-channel 奇經(jīng)extra-bow line [交通運輸工程]船首增索extra-base-point bidding [經(jīng)濟學(xué)]超基數(shù)發(fā)電extra-base hit extra-ballistics mathematical model [機械工程]外彈道數(shù)學(xué)計算模型extra-anthropic adj.外因的；人躰以外的