Both engines were running at 2,500 rpm.
两个引擎的转速都是每分钟2,500转。
Verify that the messaging engines are up and running.
确认消息传递引擎已启动和运行。
To start the engines, do a series of registering them before running them.
要想启动引擎，应该在运行它们之前注册它们。
To start the engines, do a series of registering them before running them.
要想启动引擎，应该在运行它们之前注册它们。
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