| 单词 | thirty | 
| 释义 | thir·ty    (thûrtē)n. pl.   thir·ties  1.  The cardinal number equal to 3 × 10. 2.   thirties a.  A decade or the numbers from 30 to 39: They settled down in their thirties. The temperature fell into the thirties. b.  often  Thirties The decade from 30 to 39 in a century. 3.  An indication of the end of a news story, usually written 30. 4.  Sports   The second point that is scored by one side in tennis. [Middle English thritty, thirty, from Old English thrītig; see  trei- in the Appendix of Indo-European roots.] thirty adj. & pron.  | 
	
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