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词汇 ppb
释义

Definition of ppb in US English:

ppb

(also p.p.b.)
abbreviation
  • 1(in publishing) paper, printing, and binding.

  • 2Parts per billion.

Definition of ppb in US English:

ppb

(also p.p.b.)
abbreviation
  • 1(in publishing) paper, printing, and binding.

  • 2Parts per billion.

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