That makes sense, though, because margin and capacity are relational concepts: margin is the difference between your total capacity and how much of that capacity you're using.
In the meantime, the reserve margin—the excess of generation capacity overpeak demand—has shrunk to about 8%, compared with the international standard ofat least 15%.
同时，电源储备量——超过峰值需量的额外发电容量——已减少了8％，而国际标准是至少15％。
3
Meanwhile, the shortage of capacity means that its margin of excess power has been shrinking for 20 years.