| 释义 | pre-ignition noun[ U ]
 mainly UK(also mainly USpreignition)uk /ˌpriː.ɪɡˈnɪʃ.ən/ us /ˌpriː.ɪɡˈnɪʃ.ən/
 ignition(= the process of starting to burn fuel) that happens in an engine before the correct time:
 Pre-ignition is the worst possible malfunction in the combustion chamber.
 Because of the abnormal stresses involved, preignition can be extremely damaging to an engine.
 Once pre-ignition began on the plane's engine, it was catastrophic within a few seconds.
 Anything that causes combustion to occur before the specified ignition time could be said to be causing pre-ignition.
 SMART Vocabulary: related words and phrases
 The engine & engine parts
 air filter
 alternator
 anti-roll
 antifreeze
 biting point
 brake
 cam
 carburation
 carburettor
 choke
 disc brake
 distributor
 internal combustion engine
 manual transmission
 muffler
 neutral
 suspension
 tailpipe
 tappet
 water-cooled
 
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