| 单词 | potassium-argon dating | 
| 释义 | potassium-argon dating [pǝ`tas·ē·ǝm `är´gän `dād·iŋ]  GEOLOGY Dating of archeological, geological, or organic specimens by measuring the amount of argon accumulated in the matrix rock through decay of radioactive potassium.  | 
	
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