Gas exploration has achieved a great success in the western depression of Sichuan Basin, but difficulty of exploration and development also has been increasing.
四川盆地西部坳陷中段天然气勘探取得了巨大成就，但随着勘探开发的深入，工作难度愈来愈大。
Legal positivism is an important legal school in western history of law, which plays a great role in the development of western legal thoughts.
法律实证主义是西方的重要法学流派，同时又是一个饱受误解的学派。
Legal positivism is an important legal school in western history of law, which plays a great role in the development of western legal thoughts.
法律实证主义是西方的重要法学流派，同时又是一个饱受误解的学派。
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