Autocovariance
[计] 自共变
🗣️ 情景例句
to transform it into a new community center.
将它转变成一个新的社区中心。
I'll have studied English for four years next March.
到明年三月，我就学了四年的英语了。[将来完成时，表示将完成…，会做完…]
In a heat wave we choose a midnight birthday party and that is the most exciting of all.
天气炎热时，我们便选择在半夜举办生日聚会，这种聚会是最令人激动的。