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。
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。
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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