| 单词 |
protactinium-ionium age method |
| 释义 |
protactinium-ionium age method protactinium-ionium age method[¦prōd‚ak′tin·ē·əm ī′ō·nē·əm ′āj ‚meth·əd] (geology) A method of calculating the ages of deep-sea sediments formed during the last 150,000 years from measurements of the ratio of protactinium-231 to ionium (thorium-230), based on the gradual change of this ratio over time because of the difference in half-lives. |
| 随便看 |
- command, control, and battle management
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- command, control and communication review board
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- command, control, and communications counter-measures
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- command, control and indication
- command, control and information system
- command, control and intelligence system
- command, control, and intelligence technical test
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- command control and monitoring system
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- command/control and status
- command, control, and subordinate system
- command, control and subordinate systems
- command, control and telemetry
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