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未知数

wèi zhī shù

HSK 7–9

Meaning

  • unknown number
  • (fig.) an unknown; an uncertainty

Definition

未知数是指在数学方程中尚未确定的数值，通常用字母表示；也比喻未知的事物或不确定的情况。

Unknown number refers to a value that is not yet determined in a mathematical equation, usually represented by a letter; metaphorically, it refers to an unknown thing or uncertain situation.

Usage

常用于数学语境，表示方程中待求解的变量；也用于日常生活，比喻结果不确定或尚未知道的事情。

Commonly used in mathematical contexts to denote a variable to be solved; also used in daily life to metaphorically refer to uncertain outcomes or unknown matters.

Examples

  • 1 这个方程有两个未知数，需要分别求解。 (This equation has two unknowns, which need to be solved separately.)
  • 2 这次考试的成绩还是个未知数，我很紧张。 (The result of this exam is still unknown, I'm very nervous.)
  • 3 未来充满了未知数，我们要勇敢面对。 (The future is full of unknowns, we must face it bravely.)
  • 4 在科学探索中，未知数总是存在的。 (In scientific exploration, unknowns always exist.)
  • 5 我们计划中的很多细节还是未知数。 (Many details in our plan are still unknown.)

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