Every three day嗎？
熱心網友
every other day 每隔1天every two days 每隔1天every four days 每隔3天=每4天如下圖： 1 2 3 4 1 2 3 4 ... | x x x | x x x |... 1 2 3 1 2 3 ...
熱心網友
every four days.
熱心網友
every fourth day .or : every four days.
熱心網友
Every three days
熱心網友
Every three day是每3天隔3天是Every another three day吧...