serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"不可欠な要素として働く第一義的
例:The central cause of the problem. 問題の中心的原因。
in or near a center or constituting a center; the inner area; "a central position"中心の中またはそれに近い、または中心をなす中心的
例:a central position 中央の位置
a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication電話からの線は通信を許可するために接続される情報通信として機能する仕事場電話局