一周两次用英语可以说为"twiceaweek"。如果想强调不经常,可以说为"notfrequently,onlytwiceaweek"或者"notoften,justtwiceaweek"。 一周两次用英语可以说为 "twice a week"。如果想强调不经常,可以说为 "not frequently, only twice a week" 或者 "not often, just twice a week"。