knee-jerk

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈknee-jerk adjective [only before noun]  HABITa knee-jerk reaction, answer etc is what you feel or say about a situation from habit, without thinking about it 本能反应的，自动作出反应的 SYN automatic A victim’s knee-jerk reaction to the crime is often revenge. 受害人对犯罪行为的本能反应常常是报复。

ˈknee-jerk adjectiveChineseSyllable  

knee-jerk
ˈknee-jerk adjective [only before noun]
a knee-jerk reaction, answer etc is what you feel or say about a situation from habit, without thinking about it
   SYN  automatic:
    A victim’s knee-jerk reaction to the crime is often revenge.

knee-jerkBrE /ˈniː dʒɜːk/ 🔊NAmE /ˈniː dʒɜːrk/ 🔊 adjective [only before noun] (disapproving) produced automatically, without any serious thought 本能地做出的；未经思考做出的◆It was a knee-jerk reaction on her part. 这是她未加思索做出的反应。🔊🔊