When normal flights began again, many people were too afraid to travel by air.

正常飞行开始时，许多人害怕乘飞机旅行。

During normal flight, a charger makes sure that the battery is always fully charged.

在正常飞行期间会有一个充电器确保电池总是充满电力的状态。

Southwest Airlines is back to a relatively normal flight schedule after days of widespread cancellations and delays.

在经历了几天的大范围航班取消和延误后，西南航空公司恢复了相对正常的航班时间表。

This jet isn't designed to fly that fast in normal flight, but there is a way to make it travel faster than sound, and for that, we need to fly high.

这架战斗机并没有设计得那么快，但我们依然有办法突破音障，高空空气稀薄 、温度低音速更慢，为此我们要爬升到高空。