驾驶舱门(防劫机系统)被大大加强，更多的空军力量保持着在空巡逻，出入境这一环节上也鲜有差池。
Cockpit doors have been reinforced, more air marshals patrol the skies, and better records are kept on those entering the country.
Hatches是指甲板上的舱门。
乘客们被要求在座舱门打开之前呆在座位上。
Passenger is request to remain seat until the main door is open.
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