...、需求曲线的平移 需求曲线是在其他因素不变的情况下,反映了不同的价格水平上“需求量的变化”(change in quantity demanded)。换言之,需求曲线刻画的是仅有自身价格变动时“需求量的变化”。
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在同行业内部,如果一种商品的价格变化,就会引起相关商品的需求量的变化。
At the same within the industry, if a commodity price changes, it will cause the demand for goods related to the changes.
这些变化加上空间不足,导致密集分布的高层写字楼及住房需求量聚到。
These changes, and a lack of space causes huge demand for dense, high-rise offices and housing.
随着现代科学技术的进步和社会对高精度、多样化产品需求量的增加,机床技术也在发生巨大的变化。
With the progress in science and technology and the increase in the need of high-precision and wide-variety products, great changes have been taking place in machine tool technology.
But if you look at 1860, the bottom map, if you can vaguely see those deep, dark, red areas, you can see where cotton moved, where slavery moved in the domestic slave trade, and then where Southern political power moved.
看看1860年,就在地图的最底部,如果你们能看到这些深红色的区域,你们就能明白棉花种植地的扩大,是如何导致奴隶需求量扩大的,同样变化的还有南方政权力量
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