A special locking system means the door cannot be opened accidentally.
特殊的锁定系统使门不会被意外打开。
The door of which you lost the key cannot be opened.
你丢失钥匙的那扇门开不了。
They have screwed up the door so that it cannot be opened.
他们已用螺丝钉把门钉住，所以门打不开丁。
The door cannot be opened otherwise than with a key.
这门只能用钥匙才能打开。
The door cannot be opened otherwise than with a key.
这门只能用钥匙才能打开。
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