and that produces banks of fog. 形成一团团的雾霾

141. Clearly there must be something else that takes the place of rain.
     显然 这里必须有其它东西 能代替雨水的作用
142. The secret is a cold sea current that runs parallel to the land.
     答案就是一股与陆地平行的寒冷洋流
143. The cold water cools the moist warm air above it
     冷水使得上方的暖湿气流冷却
144. and that produces banks of fog.
     形成一团团的雾霾
145. At the same time wind blowing on to the shore sweeps the fog inland.
     与此同时 吹向海岸的风将雾气带上陆地
146. Before long the cacti are dripping with dew.
     不久之后 雾凝结成了露水
147. The fog is so regular
     雾经常会出现

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 144 行