1·It seems as if this is a lesson that America's leadership needs to relearn.
看样子这是美国领导阶层需要重新学习的一课。
2·As they continued the experiment, they actually had to relearn conversation skills.
当他们持续这样的实验,他们实际上必须重新学习谈话的技巧。
3·Happiness was an emotion that he had to relearn.
幸福是他得重新学习的一种情感。