After using that burner, the boiler safety, economic and long period operation were secured further.

改用该燃烧器后，进一步保证了锅炉安全、经济和长周期运行。

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Hypervelocity impact on long duration and large size spacecraft by meteoroid and space debris is a threat to its safety operation that can in turn lead to significant damage and catastrophic failure.

微流星体及空间碎片的超高速撞击威胁着长寿命、大尺寸航天器的安全运行，导致其严重的损伤和灾难性的失效。

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High velocity impact on long duration and large size spacecraft by meteoroid and space debris is a threat to its safety operation, that can in turn lead to significant damage and catastrophic failure.

微流星体及空间碎片的高速撞击威胁着长寿命、大尺寸航天器的安全运行，导致其严重的损伤和灾难性的失效。

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