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充要条件

chōng yào tiáo jiàndictionary entry
DEFINITION CC-CEDICT
(logic) necessary and sufficient condition
Sources & editorial notes

Reference definitions: CC-CEDICT contributors and MDBG, CC BY-SA 4.0. Source release 2026-10-27T01:55:52Z. Imported 2026-10-27. Definition wording and meaning order are retained. Recognized pronunciation references are displayed with tone marks; the original source record is available below.

Source record: cd-9c95e592fab4670a. Source SHA-256: bbc4b27f26bee1a262f4d7939667a040c7857c7fc0200a2fa7a86d3352a09eae.

Original source entry:

充要條件 充要条件 [chong1 yao4 tiao2 jian4] /(logic) necessary and sufficient condition/

Reference definitions and teaching material have separate provenance.

Reference information

The definitions above are from CC-CEDICT. Examples and usage notes are available on selected entries.

Character information

View the individual characters. Their meanings do not necessarily explain the meaning of the whole word.

Other forms in these source records: 充要條件

  • 充
    chōng

    sufficient / full / to fill / to serve as / to act as / to act falsely as / to pose as

  • 要
    yāo

    (bound form) to demand / to coerce

    yào

    to want / to need / to ask for / will / shall / about to / need to / should / if (same as 要是[yào shi]) / (bound form) important

  • 条
    tiáo

    strip / item / article / clause (of law or treaty) / classifier for long thin things (ribbon, river, road, trousers etc)

  • 件
    jiàn

    item / component / classifier for events, things, clothes etc

Reference definitions from CC-CEDICT.