fourer四人赛艇选手,四桨艇选手
fournum.四
four cell placer jig四箱砂矿跳汰机
fourhanded dentistry四(只)手(操作)牙医学, 四只手操作的牙体手术
Fourier spectrometer傅里叶频谱仪,傅里叶谱仪,傅里叶光谱仪
Fourier's alteration自流注射器
Fourier-domain OCT频域OCT
"a fourfold increase in the dosage"
"quadruple rhythm has four beats per measure"
"quadruplex wire"
"the price of gasoline has increased fourfold over the past two years"