| 单词 | keystoned |
| 释义 | keystoned keystone n: (central stone of arch) SC 拱心石 gǒng xīn shí SC 拱顶石 gǒng xīn shí，gǒng dǐng shí TC 拱頂石 SC 楔石 gǒng xīn shí，xiē shí The impact knocked the keystone loose and the whole arch collapsed. keystone n: figurative (foundation) (比喻) SC 基石，基础，要旨 jī shí ，jī chǔ，yào zhǐ TC 基礎 The critic discredited the keystone of the author's argument. |
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