Michael Portillo travels on the great train routes of Europe, as he retraces the journeys featured in George Bradshaw's 1913 Continental Railway Guide.陶器的主(zhǔ )要材料为黏土(🧤)，在这周围，土是最不值钱的，随处都可(kě )以(🔒)挖到(dào )，而且还是(shì )最(zuì(📸) )新鲜的泥土。