他花了两天时间寻找宝藏，但什么也没找到。
He spent two days looking for the treasure, but found nothing.
他花了一个星期的时间到处寻找宝藏，但什么也没有找到。
He spent a week looking for the treasure everywhere, but didn't find anything.
当他回到家时，他为没有找到宝藏而向父亲道歉。
When he got home, he apologized to his father for not finding the treasure.
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