迈向现代科技的一大步是发明了第一台便携式盒式磁带播放机。

A big step towards modern technology was the invention of the first portable cassette player.

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这项协议是走向和平的一大步。

The agreement is a major step toward peace.

《柯林斯英汉双解大词典》

在家里，我爸爸说：“工作是长大的一大步。我很高兴你能为家庭做出贡献。”

At home, my dad said, "A job's a big step to growing up. I'm glad you will be contributing to the household."

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