岩

• The only road was of the "shelf" variety .
  其间仅有的路为各种“岩面”。
• They are all descended from the rock-pigeon .
  它们都是从野岩鸽传衍而来。
• A small section of rock juts out into the harbour .
  山岩的一小角突入港湾。
• The casing was driven into the soft muds in the top .
  套管被送入软岩粉顶。
• Thus clays and shales tend to be impermeable .
  因此粘土和页岩就往往不透水。
• Sandstones are, as a rule, interbedded with shales .
  砂岩通常都与页岩互层。
• The sandstone and shale units are of the same age .
  砂岩和页岩单元是同时的。
• The core pellet is placed in a chamber .
  把岩芯放在容器中。
• She threw herself from the precipice .
  她从岩上跳了下去。
• A sere on uncovered rock is a lithosere .
  在光秃岩石上的演替系列是岩生演替系列。