是"every three day"还是"every three days"(每三天)
是"every three day"还是"every three days"(每三天)
我参考书上说每隔两天是every third day,每三天every three days,他俩相等,怎么回事啊,无语
every three day;every three days应该用哪一个?
every third day每隔2天=every three days每3天?
every three days是每隔3天一次,还是每隔2天(每3天)一次?
every three days 和very third day有什么区别
in three dayS 是三天前还是三天后
He went there every ____. A.three day B.third days C.three d
every other three days =every four days 对不?
every three
.SAT的数学题In the 30-day month of April,for every three days it
In the 30-day month of April,for every three days it rained,