chóng / tàn / suān / gài / zài / tiān / rán / shuǐ / zhōng / tōng / cháng / yǐ / róng / jiě / zhuàng / tài / cún / zài

重碳酸钙在天然水中通常以溶解状态存在。

Calcium bicarbonate usually exists in dissolved form in natural water.