| 单词 | door opener |
| 释义 | door openernoun1 : a device to open a door: such as a : a tool used by firefighters to jimmy a locked door b : a release mechanism attached to a door lock and activated by a pushbutton or electric eye 2 : an inexpensive gift or premium offered to a prospect by a door-to-door salesperson in order to enter the house and present a sales pitch |
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