narrowingn.缩小；收缩；窄化；变窄动词narrow的现在分词形式.narrowadj.有限的；狭窄的；精密的；度量小的n.海峡；隘路；狭窄部份v.变窄Narrow Beam Adapter窄波束适配器narrow heritability狭义遗传率narrow leaf bulrush狭叶香蒲narrowgauge railway窄轨铁路narrow-band radar窄带雷达narrow distribution窄分布narrow-gauge film窄规胶片narrow band circuit窄频带电路narrow bridge ahead前有狭桥Narrow Band Network窄带网络