🧩 词语组成解析
n. (Petrovich)人名；(俄)彼得罗维奇
[电影]穆索尔斯基
🗣️ 情景例句
What does your father do?
你父亲从事什么职业？
Soon up, soon down.
升得高，落得快。
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。