highway construction in mountain area
highway construction in mountain area
山区公路建设
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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But red sandstone is widely distributed in China, especially existed in large quantity during highway construction in mountain area.
但红砂岩在我国分布较广泛，尤其在山区公路建设中大量存在。
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