从事贩卖

But as far as it was, had been carried on by the assiento's, or permission of the kings of Spain and Portugal, and engross'd in the public, so that few Negroes were brought, and those excessive dear.

从事贩卖黑奴的商人必须签约，保证为西班牙殖民地和葡萄牙殖民地供应黑奴，并必须获得西班牙国王或葡萄牙国王的批准。贩运黑奴是一种垄断的贸易，因而在巴西黑奴进口的数量不多，价钱也特别昂贵。

They listened always very attentively to my Discourses on these Heads, but especially to that Part which related to the buying Negroes, which was a Trade at that time not only not far entred into, but as far as it was, had been carried on by the Assiento's, or Permission of the Kings of Spain and Portugal, and engross'd in the Publick, so that few Negroes were brought, and those excessive dear.

每当我谈论这些话题的时候，大家都仔细倾听；尤其是买卖黑奴的事，更引其他们的兴趣。当时，贩运黑奴的买卖还刚刚开始。从事贩卖黑奴的商人必须签约，保证为西班牙殖民地和葡萄牙殖民地供应黑奴，并必须获得西班牙国王或葡萄牙国王的批准。贩运黑奴是一种垄断的贸易，因而在巴西黑奴进口的数量不多，价钱也特别昂贵。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。