Activity variance
[经] 活动差异
🧩 词语组成解析
variance
['vɛəriəns]
n. 变化，变动;不一致;分歧;<数>方差;
🗣️ 情景例句
It's because I have a bad cold.
那是因为我患了重感冒。
He that goes a borrowing,goes a sorrowing.
向人借债是自寻烦恼。
Even more processes are never patented at all but kept as secret processes.
更多的工艺过程根本就不会取得专利权，而是作为秘方保存着。