K12
例句
Anti-collision capacity can achieve K12 standard.
防冲撞能力达到K12冲撞等级要求；
Part two: Make a brief overview on American K12 online learning.
第二部分是对美国K12在线学习的相关概述。
Actually, I continuously in K12, in diving! Many thanks everybody's care!
其实，我一直在K 12，在潜水而已啦！多谢大家的关心！
