z (EN)

字母，符号

字母 “z”

1. 字母“Z”的小写形式
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   The word "zip" starts with the letter "z".

符号 “z”

1. 在数学中，当x和y已经被使用时的一个实数变量。
   The the equation is x + 2y + 3z2 + u = 7.
2. 数学中的复变量
   Let z = x + yi, where x is the real part and y is the imaginary part of the complex number.
3. 在数学中的三维笛卡尔坐标系的第三个坐标
   In the three-dimensional system, a point can be represented as (x, y, z).
4. 统计学中一个标准正态随机变量的值
   In our study, z > 2 indicated that the test results were significantly above average.
5. 化学中代表原子序数的符号
   In the periodic table, the element oxygen has a z = 8, indicating it has 8 protons in its nucleus.
6. 天文学中红移的符号
   Astronomers measured z = 1.5 for the distant galaxy, indicating it is moving away from us at a significant speed.