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单词 upstream
释义

WordReference Random House Learner's Dictionary of American English © 2024
up•stream /ˈʌpˈstrim/USA pronunciation   adv. 
  1. toward or in the higher part of a stream;
    against the current.

adj. 
  1. directed or located upstream.

WordReference Random House Unabridged Dictionary of American English © 2024
up•stream  (up′strēm′),USA pronunciation adv. 
  1. toward or in the higher part of a stream;
    against the current.

adj. 
  1. directed upstream;
    situated upstream:an upstream journey; an upstream hideout.
  2. Business[Com.]of or pertaining to the early stages in the operations of a business or industry, as exploration and production in the oil business (opposed to downstream).
  3. Geneticsagainst or opposite to the direction of transcription, translation, or synthesis of a DNA, RNA, or protein molecule.
  • up- + stream 1675–85

Collins Concise English Dictionary © HarperCollins Publishers::
upstream /ˈʌpˈstriːm/ adv , adj
  1. in or towards the higher part of a stream; against the current
  2. (in the oil industry) of or for any of the stages prior to oil production, such as exploration or research
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更新时间：2025/7/23 9:56:23