| 单词 | plummet | 
| 释义 | plum·met    (plŭmĭt)n. 1.  See  plumb bob. 2.  Something that weighs down or oppresses; a burden. intr.v.  plum·met·ed, plum·met·ing, plum·mets  1.  To fall straight down; plunge. 2.  To decline suddenly and steeply: Stock prices plummeted. [Middle English plomet, from Old French, ball of lead, diminutive of plom, plomb, sounding lead, from Latin plumbum.]  | 
	
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