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  1. oligotrophic

    • IPA[ˌɒlɪɡəˈtrɒfɪk]

    英式

    • adj.
      (especially of a lake) relatively poor in plant nutrients and containing abundant oxygen in the deeper parts.
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    • IPA[ˌäləɡōˈträfik]

    美式

    • adj.
      (especially of a lake) relatively low in plant nutrients and containing abundant oxygen in the ...

    Oxford American Dictionary