单词	pilot engine
释义	pilot engine noun : a locomotive going in advance of a train to make sure that the way is clear Word History First Known Use 1838, in the meaning defined above
随便看	ace ace (out) ace in the hole ACE inhibitor ace out ace point ace-high Ace-K ace-showing acebutololes acebutolols aced aced (out) aced out acedia acedias acediast aceituna Aceldama aceldamas acellular acenaphth- acenaphthene acenaphthenyl acenaphtho-

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