optional user facility

例句：

1. 1. The hotel provides a range of optional user facilities to enhance the guest experience.
   酒店提供一系列可选的用户设施，以提升客人体验。
2. 2. The new software offers an optional user facility for customizing settings.
   新软件提供了一项可选的用户设施，用于自定义设置。
3. 3. Many hotels offer optional user facilities such as Wi-Fi and in-room entertainment.
   许多酒店提供可选的用户设施，如Wi-Fi和室内娱乐。