Ik
abbr. 钾电流；反向动力学（Inverse Kinematics）
🗣️ 情景例句
He started with them almost forty years ago.
他在那里做了快四十年了。
Experience is a school from which one can never graduate.
经验无止境。
Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
因此，我们不时地掉过头，怀疑车后是否留下了机油和汽油的痕迹。