He has finally cracked the system after years of painstaking research.
经过数年的艰苦研究，他最终破译了该系统。
Actually, writes a scientific research paper often is must pay the huge painstaking care.
其实，写一篇科研论文往往是要付出巨大心血的。
Actually, writes a scientific research paper often is must pay the huge painstaking care.
其实，写一篇科研论文往往是要付出巨大心血的。
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