工作更长时间有三大优势。
随着能源形式的紧张，油页岩凭借三大优势进入新能源视野。
With the shortage of energy resources, oil shale emerges as an alternative energy resource for its three key virtues.
上述三大优势，新的技术思路，用语言理论描述说服旁人，是非常困难的。
The three major advantages, New technical ideas, Theoretical description of language to persuade others, very difficult.
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