Lapis albus
[化] 天然氟硅酸钙\\n[医] 白石(硅氟化钙)
🗣️ 情景例句
I still live with my parents.
我还和父母同住。
To knit a scarf for her sweetheart
替她的情人织围巾
One man was told to fix up an air-line to provide compressed air for the machines they were using.
有个工人被派去安装"供气管",给他们正在使用的机器提供压缩空气。
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