1. Perventing frequency collapse is an important prevention measure of widespread blackout.
防止电力系统频率崩溃是防止系统大面积停电的一项重要措施。

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2. Perventing frequency collapse is an important prevention measure of widespread blackout.
防止电力系统频率崩溃是防止系统大面积停电的一项重要措施。

来自互联网