尽管吉米·卡特去狱中探望了阿兰·格罗斯并呼吁将其释放，但卡特表示此行的主要目的是为了推动华盛顿和哈瓦那的关系。
But although Mr Carter met the contractor in prison and called for his release, he said his main aim was to try to improve relations between Washington and Havana.
此行的主要目的是什么呢?有特殊的意义还是只是到处玩玩。
What's the main goal you've done these? Some purposes or just have fun?
我和我老公周末去参加了一个婚庆博览会，因为老公的职业是刚刚入门的婚礼摄影师，所以我们此行的主要目的是学习一些婚礼摄影的经验。
My husband and I attended a bridal fair trying to drum up work for his fledgling wedding photography business.
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