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Potassium-argon
 potassium-argon
chem. 钾—氩
| Dating
 dating
desert. 断代; 年代测定
fin. 期日; 约期
interntl.trade. 日期

to phrases
potassium-argon
chem. 钾—氩
earth.sc. 钾-氩法
Potassium-argon Dating
: 13 phrases in 3 subjects
Desert science4
Oil / petroleum1
Technology8