The sea had eaten into the soft limestone cliffs on which they had been built.
海水已经侵蚀了他们建造出的软石灰岩峭壁。
Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;
本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。
Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;
本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。
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