Key stock and flow variables used in the diagram. In the table, “(…)” represents any source of generation, such as nuclear, coal, natural gas, wind, or solar.

Key stock and flow variables used in the diagram. In the table, “(…)” represents any source of generation, such as nuclear, coal, natural gas, wind, or solar.本示意图中使用的关键存量与流量变量。在该表格中，‘(…)’代表任意发电来源，例如核能、煤炭、天然气、风能或太阳能。