自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
V-RECIP-ERG （使）交替；（使）轮流 When you alternate two things, you keep using one then the other. When one thing alternates with another, the first regularly occurs after the other.
Her aggressive moods alternated with gentle or more co-operative states...
The three acts will alternate as headliners throughout the tour...
ADJ 交替的；轮流的 Alternate actions, events, or processes regularly occur after each other.
They were streaked with alternate bands of colour.
ADJ 每隔一（天等）的 If something happens on alternate days, it happens on one day, then happens on every second day after that. In the same way, something can happen in alternate weeks, years, or other periods of time.
Lesley had agreed to Jim going skiing in alternate years.
ADJ 供选择的；备用的；其他的 You use alternate to describe a plan, idea, or system which is different from the one already in operation and can be used instead of it.
His group was forced to turn back and take an alternate route.
...alternate forms of medical treatment.
N-COUNT 代替者；候补者 An alternate is a person or thing that replaces another, and can act or be used instead of them.
In most jurisdictions, twelve jurors and two alternates are chosen...
The six food groups include grain products, vegetables, fruits, milk and milk products, meats and meat alternates, and a miscellaneous group.
ADJ （尤其在美国英语中，当alternative作义项3、4和5解时，代替alternative使用） Alternate is sometimes used, especially in American English, instead of alternative in meanings 3, 4, and 5.
...an alternate lifestyle.