Natrum
[化] 天然碱\\n[医] 钠(11号元素)
🗣️ 情景例句
How many classes are you taking this semester?
这学期你有多少课？
There are spots in (or on) the sum.
人孰无过。
He spent most of his life gathering money.
他一生大部分时间用来积聚钱财。