So it was a puzzle when Apollo moon rocks suggested the moon still had a magnetic field 4.2 billion years ago, millions of years after the powerful mixing is thought to have ended.

因此，当阿波罗月球陨石揭示了42亿年前的月球，在那些威力强大的混合熔岩凝固后，可能仍然存在磁场的时候，这的确令人费解。

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So it was a puzzle when Apollo moon rocks suggested the moon still had a magnetic field 4.2 billion years ago, millions of years after the powerful mixing is thought to have ended.

因此，当阿波罗月球陨石揭示了42亿年前的月球，在那些威力强大的混合熔岩凝固后，可能仍然存在磁场的时候，这的确令人费解。

youdao