The mechanism that locks the cockpit door is designed to be used by pilots only and intended for everyone's security.

驾驶舱门为专门为机长设计的，目的是为了保护所有人的安全。

youdao

The attendants set up a barrier to the cockpit and give us an all-clear signal to open the door, as we don't have a separate bathroom and have to use the same one as everyone else.

乘务员就会在驾驶舱前拉开一道屏障，然后给我们发送一个无人信号才能使用。

youdao

But when he tried to get back into the cockpit, the door would not open.

但当他从洗手间出来试图重新进入驾驶室时却发现门已经打不开了。

youdao

It wasn't so long ago that some planes had no cockpit door at all.

CNN: Airlines move swiftly to secure cockpits

On receipt of a warning, the pilot would make sure the cockpit door was locked and immediately begin landing procedures.

CNN: Task force recommends strong air security measures

An airline security task force, made up of representatives from airlines, aircraft makers, pilots and flight attendants unions, recommended the cockpit door reinforcements.

CNN: Airlines move swiftly to secure cockpits