U (EN)

字母，名词，介词，符号

字母 “U”

1. 字母“u”的大写形式
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   In the name "Ulysses", the letter "U" is capitalized.

名词 “U”

1. “U-turn”的简称，是指车辆反向行驶的一种操作。
   After missing the exit, he realized he had to make a quick U to get back on the right track.
2. 大学的缩写
   She's planning to apply to the U. of Texas next year.
3. 星期天的缩写
   There are no classes scheduled for F S U and M.

介词 “U”

1. 体育中“年龄组”或“年龄级别”的缩写
   He was selected for the U21 national football team last summer.

符号 “U”

1. 铀（具有原子序数92的元素）的符号是U。
   U-235 is a highly sought-after isotope of uranium for nuclear reactors.
2. 尿嘧啶（RNA的一个组成部分）的1个字母符号
   In the RNA sequence AUGC, the "U" stands for uracil.
3. 物理学中电压的符号
   To calculate the electric power, use the formula P = U * I.
4. 统计学中均匀分布的符号
   To model the probability of rolling any number on a fair six-sided die, we can use the U(1,6) uniform distribution.
5. 保持长度的一组复数矩阵的单位群的符号
   In our quantum mechanics class, we learned that U(2) represents the unitary group of 2x2 matrices.