Sn
[计] 顺序号\\n[医] 锡(50号元素)
✅ 同义词
🗣️ 情景例句
I always mix up these two words.
我老是把这两个词搞混。
He who makes constant complaint gets little compassion.
经常诉苦抱怨，难以博得同情。
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。