forward echo

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of pre-echo. countable,uncountable
  2. The propagation of a signal reflection in the same direction as the original signal and consisting of energy reflected back by one discontinuity and then forward again by another discontinuity. countable,uncountable

词形变化

forward echoes plural
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