独立飞行员协会已提起诉讼，要求政府为所有飞行员设定一个安全级别。
The Independent Pilots Association has filed a lawsuit asking the government to set one level of safety for all pilots.
当他出现在采石场的时候，他感到很安全，所以他灵活地提起脚后跟，飞奔起来。
When he emerged at the quarry he felt secure, and so he picked up his nimble heels and flew.
最常被提起的不愿意迁移到云端的理由就是对安全的担心。
The most cited reason for not moving to the cloud is concern about security.
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