By the late eighties their number had grown fourfold.到80年代末的時候，他們的數量已是原來的4倍。For a diagnosis of tularemia you need a fourfold increase in serum antibody levels.要診斷是兔熱癥,她的血清抗體等級需要有4個部分的增長.Electric hand is basic be electric...

fourfold的音標：fourfold的英式發音音標為：['f?:f??ld]fourfold的美式發音音標為：['f?rfo?ld]...