Under the condition of total or partial power net breakdown, system recovery can be realized by black-start scheme, in which units with self-start ability are used to bring others to start up.
电网全部或部分因故障停运后，采用黑启动方案，通过系统中具有自启动能力的机组带动无自启动能力的机组，可实现整个电网的恢复。
Many of my friends in their 20s and 30s have to self-start their retirement accounts because their employer no longer offers pension options.
我的很多朋友在他们20多岁、30多岁时不得不自己建立退休金账户，因为他们的雇主不再提供养老金。
Higher inlet propellant pressure is helpful for self-start engine.
对于自身启动发动机，较高的入口压力有利于发动机启动。
Higher inlet propellant pressure is helpful for self-start engine.
对于自身启动发动机，较高的入口压力有利于发动机启动。
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