fourfold例句
By the late eighties their number had grown
fourfold.
到80年代末的时候，他们的数量已是原来的4倍。
For a diagnosis of tularemia you need a
fourfold increase in serum antibody levels.
要诊断是兔热症,她的血清抗体等级需要有4个部分的增长.
Electric hand is basic be electric head ache is
fourfold.
电手基本是电头疼痛的四倍.