为了备战比赛，他进行了两周的强化训练。

He underwent two weeks of ___intensive training to prepare for the competition.

为了快速提高，她去年夏天参加了一个英语强化课程。

She enrolled in an ___intensive English course last summer to improve quickly.

他流利的法语是多年来强化学习的结果。

His fluent French is the result of ___intensive study over many years.