delta

FREQ #6596 ★☆☆☆☆

n. 三角洲, 希腊字母的第四个字 [医] δ(希腊文的第四个字母), 丁种, 三角, 三角形区

发音

US /ˈdɛltə/

词形变化

deltas 复数 deltas deltaed deltaing deltas 三单 deltaing 现在分词 deltaed 过去式 deltaed 过去分词

释义与例句

n.
  1. 1.

    The fourth letter of the modern Greek alphabet Δ, δ.

    德尔塔

  2. 2.

    A landform at the mouth of a river where it empties into a body of water.

    三角洲

    Nile Delta

  3. 3.

    Alternative letter-case form of Delta from the NATO/ICAO Phonetic Alphabet.

  4. 4.

    The symbol Δ; A change in a quantity, likely from "d" for "difference".

    工程 数学 物理

    ΔV - "delta vee"(change in velocity, used in rocketry and orbital mechanics)

  5. 5.

    The rate of change in an option value with respect to the underlying asset's price.

    商务 金融
  6. 6.

    A value in delta notation indicating the relative abundances of isotopes.

    化学
  7. 7.

    The set of differences between two versions of a file.

    计算机 工程 数学

    When you update the file, the system will only save the deltas.

  8. 8.

    A small but noticeable effect. Compare epsilon.

    非正式 计算机 工程 数学

    This will slow the main code path down, but only by delta.

  9. 9.

    The angle subtended at the center of a circular arc.

  10. 10.

    A type of cargo bike that has one wheel in front and two in back.

  11. 11.

    The closed figure produced by connecting three coils or circuits successively, end for end, especially in a three-phase system.

    定语 商务 工程 物理

    delta winding; delta connection; delta current

  12. 12.

    A military unit, nominally headed by a colonel, equivalent to a USAF operations wing, or an army regiment.

    美国 政治 军事
  13. 13.

    a star that is usually the fourth brightest of a constellation.

    天文
  14. 14.

    one of four baryons consisting of up and down quarks with a combined spin of 3/2: Δ⁺⁺ (uuu), Δ⁺ (uud), Δ⁰ (udd), or Δ⁻ (ddd)

    物理
  15. 15.

    Ellipsis of delta variant (variant of the SARS-CoV-2 virus).

    医学
v.
  1. 1.

    To calculate the differences between the characters in an enciphered text and the characters a fixed number of positions previous.

    计算机 工程 数学
  2. 2.

    To compare two versions of the same file in order to determine where they differ (where a programmer has made edits).

    计算机 工程 数学

词汇关系

相关短语

词源

From Ancient Greek δέλτα (délta), borrowed from a Phoenician word for "door", ultimately from Proto-Semitic *dalt-. Doublet of dalet. * (river): from the triangular shape of the majuscule Greek letter delta Δ * (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ

来源:wiktionary