They also need at least three years of related experience or at least 1,000 hours as a jet airplane pilot.

同时，宇航员还需要至少三年的相关经验或至少1000小时的驾驶飞机时长。

The noise can be the sound of a jet airplane or machines in factories or loud music or other common sounds found at home or at work.

噪声可以是喷气式飞机的声音，也可以是工厂里的机器声，还可以是响亮的音乐或其他在家庭或工作中常见的声音。