The chimneys were built of stones and turf, and the roofs were thatched with grass.
烟囱的材料用的是石头和泥炭屋顶则用茅草覆盖。
The tunnel would be well-ventilated (9) tall chimneys were built (10) sea level.
只需建造些高出海面的高高的烟囱，该隧道便会通风良好。
The tunnel would be well-ventilated if tall chimneys were built above sea level.
如果再建些伸出海面的高大的烟囱状通风管，隧道就具备了良好的通风条件。
All this timber was piled up under a large shed, built near the Chimneys, and there awaited the time for use.
“石窟”附近盖了一间大棚子，把所有这些木料都堆在那里，等候开工。
All this timber was piled up under a large shed, built near the Chimneys, and there awaited the time for use.
“石窟”附近盖了一间大棚子，把所有这些木料都堆在那里，等候开工。
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