| 单词 | titter | 
| 释义 | tit·ter    (tĭtər)intr.v.  tit·tered, tit·ter·ing, tit·ters   To laugh in a restrained, nervous way; giggle. n.  A nervous giggle. [Probably imitative.] titter·er n. titter·ing·ly adv.  | 
	
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