請將下面這段話翻譯成英文：

　　掛壁公路

　　掛壁公路是公路的一種類型，即在懸崖峭壁內(nèi)側(cè)開鑿而出的隧洞式的盤山公路，具有鮮明的特色。為施工方便和開通后取自然光照明，掛壁公路多貼山壁而鑿，相隔十余米旁開一側(cè)洞透光透氣。從遠處望去，這一線側(cè)窗勾勒出隧洞的走向。中國現(xiàn)有掛壁公路7條，主要位于南太行山地區(qū)山西省的東南部。

　　參考譯文

　　Hanging Roads

　　Hanging Roads are a distinctive form of road that are embedded into the twisting sides of mountains.To simplify constructionand allow for sufficient natural light, the roads were built into cliff facesroughly 10 meters deeps.Holesare cut into one side to provide light and fresh air. From a distance, a view of windows marks the direction of the tunnel. Seven hanging roads can be found in China, most of which are locatedin the Southern Taihang Mountains of southeasternJiangxi Province.

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