engine back fire
发动机回火
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The crowd fell back to let the fire engine through.
人群向后退去，以便给消防车让路。
youdao
The ship had reached its destination of Cozumel, Mexico, and was en route back home when a fire broke out in the engine room early Sunday, and then power was lost.
CNN: On crippled cruise ship, icky jobs fell to 'amazing' crew
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