大楼的钥匙管理员负责保管所有办公室的门禁卡。

The ___keymaster of the building is responsible for keeping all the office access cards.

在古老的传说中，那位神秘的钥匙大师守护着通往地下宝藏的大门。

In the ancient legend, the mysterious ___keymaster guarded the door to the underground treasure.