Question

ammunition

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am∙mu∙ni∙tion / ˌæmjəˈnɪʃən ; ˌæmjʊˈnɪʃən /
◙noun [U]
1. bullets, shells ( SHELL¹ (2)) etc that are fired from guns
• 弹药
2. information that you can use to criticize someone or win an argument against them
• 〔批评或辩论中攻击他人的〕把柄，弹药，证据:
 »give sb ammunition / provide sb with ammunition
 »His mistakes provided political opponents with even more ammunition.
  他的过失给政治对手提供了更多的把柄。