By the 1850s, the U. s. was en route to becoming the workshop of the world, rapidly churning out cheap yet high-quality textiles, clocks, guns and other goods.

19世纪50年代的美国也是当时的世界工厂，大量生产价格便宜但质量高的纺织、钟表、枪械和其他物质。

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Because of this movement, a route taken at a fixed Angle to the Sun results in a U-shaped path.

由于这种运动，与太阳成一定角度飞行的路线产生一个U字形的轨迹。

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Because of this movement, a route taken at a fixed Angle to the Sun results in a U-shaped path.

由于这种运动，与太阳成一定角度飞行的路线产生一个U字形的轨迹。

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