δ (EN)

字母，符号

字母 “δ”

1. 希腊字母的第四个字母
   注册以查看例句的翻译和每个单词的单语定义。

   The teacher wrote the letter δ on the blackboard.

符号 “δ”

1. （天文学）赤纬；天体在天球赤道以北或以南的角距离。
   The astronomer noted the star's right ascension and δ.
2. （数学）任何小值或值的变化
   The physicist wrote δ in the equation to represent a small change.