Autocovariance
[计] 自共变
🗣️ 情景例句
What a pity! We have another party that day.
太可惜了，我们那天也有个聚会。
Thank you for your inquiry, but we cannot make you an offer right now because we are presently unable to obtain appropriate materials.
谢谢贵方询价，但我们不能马上发盘，因为目前我们得不到合适的原料。
The guest who arrives half an hour too soon is the greatest nuisance.
客人提前半小时到达是令人讨厌的。