PSK

例句：

1. 1. The password is a secret that only the computer knows.
   密码是一个只有计算机知道的秘密。
2. 2. He entered the password to unlock the door.
   他输入密码来解锁门。
3. 3. The PSK was changed after the system was updated.
   系统更新后，密码被更改了。