The paths are often very rocky so strong boots are advisable.路上通常石头很多，所以最好穿结实耐磨的靴子。Their relationship had gotten off to a rocky start.他们的关系在磕磕绊绊中开始了。A walker fell 80ft from a rocky pinnacle.一位徒步者从一块80英尺高的尖锥形岩石上摔了下来。...
猪在泥沙沼中打滚.The pigs wallowed in the mud.荷兰大多数其它土壤类型是沼生的.Most other Dutch soil types are fluvial.有趣的是在叶状沼兰叶子上发生无融合生殖的结构.The occurrence of apomictic reproductive structures on the leaf of the bog orchid, is of interest....