underwhelm vt.未留下深刻印象underwent vt.遭遇；經(jīng)受undergo 的過去式.underweight (adj.) underweight adj.重量不足的n.重量不足underwear hanger [經(jīng)濟學]內衣衣架underwear (n.) underwear n.襯衣，內衣underway replenishment ship [交通運輸工程]航行補給船underway replenishment force [軍事學]海上補給部隊underway replenishment capability [交通運輸工程]航行補給能力underway replenishment at sea [交通運輸工程]艦船海上橫向補給海上航行補給underway replenishment [交通運輸工程]航行補給underway (adv.) underway adj. 在進行中的；（船、火車等）在行進中的underwatertunnel 水下隧道underwaterfired adj.水下發(fā)射的underwaterconcreting 水下混凝土澆筑underwater wet welding [能源科學技術]濕法焊接underwater welding 水下焊接underwater viewing window [體育]水下觀察窗