二次开发技术
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second developing technology
二次显影技术
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Even so, 170 billion barrels places Alberta second only to Saudi Arabia in terms of proven oil reserves, and ever-developing technology is likely to bring more in reach.
FORBES: The Promise And Pitfalls Of Canada's Oil Sands
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