学习资料
[意 思]adj. (两个)交替的,轮流的
[例]  According to the weather forecast, there will be a week of alternate rain and sunshine. 根据天气预报,下礼拜时雨时晴。
adj. 间隔的
[例]  They saw each other on alternate Sundays.
他们每隔一个星期天相会一次。
n. 代替者,候补者
[例]  We have several alternates on our team.
我队有几名替补队员。
vi.& vt. 交替,轮流
[例]  For the next few days he alternated between hope and fear. 其后几天中他时而满怀希望,时而充满恐惧。