null

FREQ #25903

a. 无效力的, 无效的, 无价值的 n. 零, 空, 零位 [计] 空

发音

CA /nʌl/
UK /nʌl/
US /nʌl/
US /nʊl/
AU /nɐl/
NZ /nɐl/
AU /nal/
NZ /nal/
其它 /nʊl/

词形变化

nulls 复数 nulls nulled nulling nulls 三单 nulling 现在分词 nulled 过去式 nulled 过去分词 more null 比较级 most null 最高级

释义与例句

n.
  1. 1.

    A non-existent or empty value or set of values.

    空值

  2. 2.

    Zero quantity of expressions; nothing.

  3. 3.

    Something that has no force or meaning.

  4. 4.

    The null character; the ASCII or Unicode character (␀), represented by a zero value, which indicates no character and is sometimes used as a string terminator.

    计算机 工程 数学
  5. 5.

    The attribute of an entity that has no valid value.

    计算机 工程 数学

    Since no date of birth was entered for the patient, his age is null.

  6. 6.

    One of the beads in nulled work.

  7. 7.

    The null hypothesis.

    数学
v.
  1. 1.

    To nullify; to annul.

    古体 及物
  2. 2.

    To return to the null position, setting, etc.

  3. 3.

    To form nulls, or into nulls, as in a lathe.

  4. 4.

    To crack; to remove restrictions or limitations in (software).

    俚语 及物 计算机 工程 数学
adj.
  1. 1.

    Insignificant.

  2. 2.

    Absent or non-existent.

  3. 3.

    Of the null set.

    数学
  4. 4.

    Of or comprising a value of precisely zero.

    数学
  5. 5.

    Causing a complete loss of gene function; amorphic.

    生物 医学
  6. 6.

    Neutral.

    工程
  7. 7.

    Having no validity; "null and void".

词汇关系

名词

同义词 10

nothing zero zip cipher naught nil nix zilch aught zippo

下位词 4

bugger all Fanny Adams fuck all nihil
形容词

同义词 1

void

近义相关 1

invalid

相关短语

null set [计] 空集, 零集 null pointer [计] 零指示字, 零指针 null hypothesis [计] 虚假说, 零假说 [化] 零假设; 原假设 null infinity null path length null anaphora null and void 无效的 [化] 作废 null hypotheses null recurrent null persistent null recurrence null modem [计] 空调制解调器 null modems null infinities

词源

Borrowed from Middle French nul, from Latin nūllus.

来源：wiktionary