It's like one of the biggest zoos here in the United States of America.
它差不多是全美国最大的动物园之一。
In 1860 slaves as an asset were worth more than all of America's manufacturing, all of the railroads, all of the productive capacity of the United States put together.
860年,奴隶作为财产的产值超过了,美国所有的制造业,所有的铁路,和所有产业的产值总和
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