✨ Best Answer ✨
他們意思真的非常近，但要說的話primary更強調「第一重要的」，更詳細的解說可以看下面的連結
https://www.bbc.co.uk/learningenglish/chinese/features/q-and-a/ep-151105
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了解了！謝謝解答～🙏🏻