fourfold interlacing四重隔行扫描;隔三行扫描
Fourfold Amen四叠阿门
the fourfold四重性
Fourfold Gospel四重福音
fourfold yarn四股线
Fourfold circuit四倍频鉴向电路
fourfold negation四句分别
fourfold data四格表
fourfold ring四联环
ADJ（形容词） equal to or having four times as many or as much 四倍的
ADV（副词） by or up to four times as many or as much 四倍地