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peak and trough?



 
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ESL Forum | English Vocabulary, Grammar and Idioms
We often change the tense while changing direct speech to indirect speech? | room vs. the room
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peak and trough? #1 (permalink) Fri Sep 04, 2009 18:19 pm   peak and trough?
 

What is the meaning of this phrase: "peak and trough." It refers to wave an the sea. Can you show me the synonym of this phrase? Thank you so much.
Jung
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peak and trough? #2 (permalink) Fri Sep 04, 2009 19:35 pm   peak and trough?
 

Hi,

This expression suggests 'highs and lows' or 'ups and downs' or 'high points and low points.

Alan
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We often change the tense while changing direct speech to indirect speech? | room vs. the room
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