1 COMB in ADJ （与表示地点的名词连用）表示“总部设在…的”，“以…为基地的” -based combines with nouns referring to places to mean something positioned or existing mainly in the place mentioned, or operating or organized from that place. （与表示地点的名词连用）表示“总部设在…的”，“以…为基地的”
2 COMB in ADJ （与名词连用）表示“以…为中心的”，“以…为主要部分（或特征）的” -based combines with nouns to mean that the thing mentioned is a central part or feature. （与名词连用）表示“以…为中心的”，“以…为主要部分（或特征）的”
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...computer-based jobs.
通过计算机来完成的工作
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...oil-based sauces.
以油为主的调料
3 COMB in ADJ-GRADED （与副词连用）表示“有…基础的” -based combines with adverbs to mean having a particular kind of basis. （与副词连用）表示“有…基础的”