Times change and things differ; circumstances evolve with the passage of time.
过去我们住在小镇，生活简单，现在搬到大城市，时异事殊，一切都变得复杂而快节奏。
In the past, we lived in a small town with a simple life, but now that we've moved to a big city, times have changed and things are different; everything has become complex and fast-paced.
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