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1. The cell membrane is made upof a variety of proteins and lipids, including some positively charged ions.
细胞膜由多种蛋白质和脂质组成，其中包括一些带正电荷的离子。
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2.In the process of photosynthesis, plants absorb carbon dioxide from theair and release oxygen as a byproduct. This process involves the transfer of positiveions from one molecule to another.
在光合作用过程中，植物从空气中吸收二氧化碳并释放氧气作为副产品。这个过程涉及从一个分子到另一个分子中转移正离子。
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3. Thestudy of these ionsis crucial for understanding the structureand function of biological molecules.
对这些离子的研究对于理解生物分子的结构和功能至关重要。