他迅速向他担忧的父母保证他已经安全抵达。

他迅速向他担忧的父母保证他已经安全抵达。

He quickly assured his worried parents that he had arrived safely.

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He quickly assured his worried parents that he had arrived safely.

assured 是动词 assure 的过去式,assure 由前缀 as-(表示"使")和 sure("确信的")组成,意思是"向某人保证、使确信"。在这里表示"向父母做出保证"这个过去发生的动作。

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