| 单词 | activity |
| 释义 | activity n. (pl. -ies) 1. a the condition of being active or moving about. b the exertion of energy; vigorous action. 2. (often in pl.) a particular occupation or pursuit (outdoor activities). 3. = RADIOACTIVITY. Etymology: F activit{eacute} or LL activitas (as ACTIVE) |
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