应声
yìng​shēngyīng​shēng

at the sound

yìng​shēng at the sound · echo · to parrot · instantly
  1. 应 應 yìng verbnoun
    to suit
    (bound form) to suit; to respond to; to comply with
  2. 声 聲 shēng noun
    sound
    sound; voice; noise; something that can be heard

yīng​shēng to answer
  1. 应 應 yìng nounverb
    to answer
    to answer; to respond; to reply to a call or a question
  2. 声 聲 shēng noun
    sound
    sound; voice; noise; something that can be heard