Fourot富罗
fournum.四
four-wire arm四线横担
four level code四电平码, 四级码
Four words poem四言诗
fourdimensionedadj.四次的
four-way pipe四通管
Fourier sectrum[计] 傅里叶谱
four educations四大教育
four-by-twon.擦枪布
four-o' clock
four dot tester四孔检查器