hollowfoot秕谷hollowadj.空的；空洞的；凹陷的；虚伪的；(声音)沉闷的n.山谷；洞；窟窿vt.挖空vi.形成空洞adv.完全地；彻底hollow fiber membrane adsorbents中空纤维膜吸附剂hollow cathode aluminum ion laser空心阴极铝离子激光器hollow cover board without girder空心无梁楼盖hollow-cup A.C. servo motor空心杯交流伺服电动机hollow disease and pumping damage脱空唧泥hollow cylindrical roller bearing空心圆柱滚子轴承hollowing out of rural population农村人口空心化hollow-conductor-cooled rotor内冷发电机转子hollow - elastic foundation beam空腹弹性地基梁hollow-fiher membrane oxygenator中空纤维膜式氧合器