1. Ever since European first explored Australia, people have been trying to understand the ancient rock drawings and cavings created by the Aborigines, the original inhabitants of the continent.
自从欧洲人首次发现澳洲，人们就在尝试了解由土著居民，即这片大陆的原始居民，创作的古代岩画和雕刻品。
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2. Cuttings are distinct from cavings, rock debris that spalls as a result of wellbore instability.
岩屑与由于井壁失稳而坍塌的落石及剥落的岩石碎片截然不同。
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3. Cuttings are distinct from cavings, rock debris that spalls as a result of wellbore instability.
