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1. The security system has a back locking feature that prevents unauthorized access.
这个安全系统有一个回锁功能，防止未经授权的访问。
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2. The car's trunk is equipped with a back locking mechanism to secure the contents.
这辆车的后备箱配备了一个回锁机制，用于保护内容物。
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3. The new software features an improved back locking system for added security.
新软件改进了回锁系统，以增加安全性。