70年来，中国发生了历史性变化，取得了巨大成就。
In the past 70 years, China has experienced historic changes and made great achievements.
主要的历史性变化是发生在大陆上。
The chief historical changes were to take place on the mainland.
我们禁不住感叹这个便利的发明给人们的日常生活带来的历史性变化。
We couldn't help marveling at the historic change such a convenient invention brought to People's Daily lives.
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