underset n.潛流；底流；暗流underserve (v.) underservant n.幫手underserrated adj.底面刻齒的undersells vt. 以比 ... 低的價(jià)格出售underselling vt. 以比 ... 低的價(jià)格出售underseller vt. 以比 ... 低的價(jià)格出售undersell competitor [土木建筑工程]售價(jià)比競爭者低undersell vt. 以比 ... 低的價(jià)格出售underseepage n.下方滲流undersecretaryship n.副部長undersecretary general [經(jīng)濟(jì)學(xué)]付秘書長undersecretary n.次長；副部長undersecretaries n.次長；副部長undersecretariat n.副部長(或次長)職務(wù)(或職位或其掌管的部門)underseasj adv.在海底(在海面下)underseas adv.海面下地；海底地underseam 下層underseal vt.底封(基層處理)n.底封undersea vehicle [能源科學(xué)技術(shù)]潛水器