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1·In the case where Cubans exchange homes of equal value in a barter agreement, each side will pay 4% of the value of their home.

如果古巴居民根据交换协议互相交换等值的房屋，双方则需要缴纳房屋价值4%的费用。

2·After a long discussion we've come to an agreement on barter trade.

经过长时间的讨论，我们已在易货贸易方面达成了协议。

3·Well, let's first negotiate a barter trade agreement, stipulating some general terms and conditions.

好吧，让我们先协定一个易货贸易协定，规定一些一般性条款。渊。