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η (EN)
字母,符号

字母 “η”

η, eta
  1. 希腊字母表的第七个字母
    In studying Greek texts, one must recognize the letter η, which represents a long 'e' sound.

符号 “η”

η
  1. (物理)表示效率或粘度的符号
    The engineer calculated the efficiency η of the solar panel to determine its performance.
  2. (数学)用于表示各种数学概念的符号,例如狄利克雷η函数。
    In number theory, the eta function η (s) is important for understanding the distribution of prime numbers.