| 单词 | decay |
| 释义 | decay v. & n. --v 1. a intr. rot, decompose. b tr. cause to rot or decompose. 2. intr. & tr. decline or cause to decline in quality, power, wealth, energy, beauty, etc. 3. intr. Physics a (usu. foll. by to) (of a substance etc.) undergo change by radioactivity. b undergo a gradual decrease in magnitude of a physical quantity. --n 1. a rotten or ruinous state; a process of wasting away. 2. decline in health, quality, etc. 3. Physics a change into another substance etc. by radioactivity. b a decrease in the magnitude of a physical quantity, esp. the intensity of radiation or amplitude of oscillation. 4. decayed tissue. Derivatives decayable adj. Etymology: ME f. OF decair f. Rmc (as DE-, L cadere fall) |
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