roughen 在《牛津英西词典》中的词汇

roughen 在《PONS词典》中的词汇

到英语_美式英语

单语范例（未经PONS编辑处理）

英语
The particular objects (such as a vase) were first roughened by engraving or using hydrofluoric acid to etch a design.
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The surface is dry, often roughened and pitted, and with a network of grooves or ridges (striations) or reticulations near the top of the stem.
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The bark is smooth light gray, roughened by many narrow ridges.
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The whole surface is further roughened by microscopic flexuous wrinklings.
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The five whorls are separated by canaliculate sutures, convex, the embryonic ones smooth, the rest roughened.
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The spores are spherical, roughened by many small points or warts, and measure 2.44 m.
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The tuft is small and the terminal joint is roughened in front.
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Alternatively, beginning with a smooth plate, areas are roughened to make them darker.
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Spores are elliptical, with a finely roughened surface, measuring 810 by 56.5 m.
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The ductus seminalis attaches at the side, from the hind end of the long, broad ductus bursae, whose surface is mostly roughened.
en.wikipedia.org

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