Sn
[计] 顺序号\\n[医] 锡(50号元素)
✅ 同义词
🗣️ 情景例句
By all means, you ahead.
当然可以。随便。
Wit bought is better than wit taught.
不经一事，不长一智。
Finally, turn off the lights and lock the door.
最后，关上灯，锁好门。