Yan an period的用法和樣例：
例句
- It can be said that Mao Zedong Thought assumed relatively complete form during the Yan'an period.
延安時(shí)期那一段，可以說(shuō)是毛澤東思想比較完整地形成起來(lái)的一段。 - How to reform and unify the masses, especially peasants, is the problem which Mao Zedong thought about in that period.
如何改造和團結民眾尤其是農民，這是延安時(shí)期毛澤東始終在考慮的問(wèn)題。
