不定: indefinite; indeterminate方程: equation不定方程式: indefinite equation不定方程组: indeterminate equations; indeterminate system of equations超定方程: overdetermined equation超定方程组: overdetermined set非稳定方程: transient equation决定方程: determining equation; indicial equation欠定方程: underdetermined equation确定方程: determinate equation确定方程式: definitional equation稳定方程: steady equation尾流测定方程: wake survey equation不定: 1.(表示不肯定) indefinite; indeterminate 我明天还不定来不来呢。 it's not at all certain whether i'll come tomorrow. 他一天不定来多少次。 i don't know how many times he comes a day. 事情还不定怎样呢。 it's hard to predict how things will turn out.2.(不稳定) unsteady; drifting; fitful 方向不定的风 a fitful wind; 漂泊不定 drifting from place to place; 心神不定 unsteady in mind; 不定代词 [语言学] indefinite article; 不定冠词 [语言学] indefinite article; 不定式 [数学] indeterminate form; [语言学] infinitive; 不定收入 transitory income定方: sadakata方程: [数学] equation 三次方程 cubic equation; 高次方程 equation of higher degree; 线性方程 linear equation; 把方程式简化成 ... reduce the equation to ...; 物态方程 equation of state; 化学方程 chemical equation不定式;不定的: infinitive不定差: irregular deviation不定尺: random length不定词: infinitive不定的: adventitious; adventive; ambivalent; arbitrary; errant; fluxional; fluxionary; inconstant; indefinit indefinite; indeterminate; indetermined; infinite; infinitive; moveable; mutable; neutral; topheavy; uncertain; undefined; unlimited; unsettled; variable不定地: erratically; inconstantly; variably不定点: nonpoint不定度: degree of indeterminacy; degree of uncertainty; uncertainty不定额: balance due