(1)隔週に
(2)週に2回
(3)twice a week
(4)every two weeks; "he visited his cousins fortnightly"
さらに詳しく
(1)空間または時間の距離
(2)at a distance in space or time
(3)at a distance in space or time; "the boat was 5 miles off (or away)"; "the party is still 2 weeks off (or away)"; "away back in the 18th century"