In addition, these particles were so small they could have melted quickly inside jet engines, potentially causing them to fail mid-flight.

此外，这些颗粒非常细小，有可能很快熔化进入喷气引擎，造成空中停车。

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Refining is achieved by the addition of lime, fluorspar and iron oxide to the melted steel.

在熔化了的钢中加入石灰、氟石和铁的氧化物，就可以把钢提纯。

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Refining is achieved by the addition of lime, fluorspar and iron oxide to the melted steel.

在熔化了的钢中加入石灰、氟石和铁的氧化物，就可以把钢提纯。

youdao