在二三十年前
Two or three decades ago
以上为机器翻译结果，长、整句建议使用 人工翻译 。
比如，在幼儿园竞争不断加剧的今天，幼儿家长在幼儿教育过程中所起的作用与二三十年前相比，变化就较大。
For example, in today "s increasing competition in the kindergartens, genearch are playing a very different role in kids" education compared with twenty or thirty years ago.
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