Alternation theorem
[计] 交错定理
🧩 词语组成解析
alternation
[ˌɔ:ltə:'neiʃən]
n. 交替，轮流，间隔;交替工作;更迭;变换;
🗣️ 情景例句
And you won't be able to speak for a while.
有一段时间 你们没有办法讲话。
What's the matter with you?
你怎么了？
both men were genuinely sorry that they had to leave.
这二位不得不离开那个荒岛时，还真的感到遗憾呢！