Ik
abbr. 鉀電流；反向動力學（Inverse Kinematics）
??? 情景例句
Do you have any hobbies?
你有什么業余愛好？
Marry in lent, and you'll live to repent.
借債結婚，后悔一生。
He does exercises every day in the morning.
他每天早上鍛練身體。