Knee jerk
[医] 膝反射
🧩 词语组成解析
knee
[ni]
n. 膝;膝盖;
vt. 用膝盖碰;
jerk
[dʒɝk]
vt. 猛拉;把（牛肉）切成薄片晒干;
vt.& vi. （使…）猝然一动[颤动];
n. 突然的拉[推，扭];<医>（肌肉的）痉挛，抽搐;蠢人;急促而猛烈的动作，猛地一拉;
🗣️ 情景例句
I have the key, but it doesn't work.
我有钥匙， 但是开不开箱子。
The shortest answer is doing.
最简短的回答是做。
He's gone to England with his family. He won't be back until January.
他和家人一起回英国了。要到元月份才回来。