topic

topic
noun
  1. a matter dealt with in a text, discourse, or conversation; a subject
    题目,话题;主题
    her favourite topic of conversation is her partner.
    她最爱谈的话题便是她的伙伴。
    ■(Linguistics)that part of a sentence about which something is said, typically the first major constituent
    (语言学)主题
语源
  1. late 15th cent. (originally denoting a set or book of general rules or ideas): from Latin topica, from Greek ta topika, literally 'matters concerning commonplaces' (the title of a treatise by Aristotle), from topos 'a place'
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