In the wedge - shaped plateau are great old cities supported by rich farmlands.在梯形 状 的高地上,有肥沃农田赡养的著名古城.To the north lie the flat and fertile farmlands of the Solway plain.北边是索尔韦平原平坦而肥沃的农田。They tumble down mountainsides; ...
碳精棒常用于电弧灯.The stick of carbon is often used in an electric arc lamp.内阳极有两种材质,分别为不溶性碳精棒和含磷铜棒.The inner anode includes insoluble carbon and phosphorous - copper bar....