He would tell himself to first reach the rock 100 yards ahead.
他告诉自己先到前面100码的那块岩石。
They drilled through several layers of rock to reach the oil.
他们钻透了几层岩石寻找石油。
The danger is likely to continue, they say, until the waves reach an inland area of hard rock which will not be eaten as limestone is.
他们说,这种危险可能会持续下去,直到海浪到达内陆坚硬的岩石区域,这些地方的岩石不会像石灰岩那样受到侵蚀。
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