| 字词 | 敲门砖 |
| 释义 | 敲门砖 名brick picked up to knock on the door and thrown away when it has served its purpose―stepping-stone to success 有人把上学当成敲门砖，一旦功名到手，书籍也就被束之高阁了。Some people take attending school only as a stepping-stone to status; once they succeed, all the books will be shelved. |
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