Every three day吗？
热心网友
every other day 每隔1天every two days 每隔1天every four days 每隔3天=每4天如下图： 1 2 3 4 1 2 3 4 ... | x x x | x x x |... 1 2 3 1 2 3 ...
热心网友
every four days.
热心网友
every fourth day .or : every four days.
热心网友
Every three days
热心网友
Every three day是每3天隔3天是Every another three day吧...