Natrum
[化] 天然堿\\n[醫] 鈉(11號元素)
??? 情景例句
Are all the classes within walking distance?
所有的教室都在步行范圍之內嗎？
Lily is a Sophomore now.
莉莉現在大學二年級。
Better have something we can get our hands on rather than just spend all our time talking.
有些實際材料拿到手總比坐著閑聊強。