经核算
After calculation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
中石化17日发布中期业绩预告，经公司财务部门核算上半年业绩同比下降50%以上，业绩如此大滑坡的主要原因是在炼油业务上的巨大损失。
Oil giant Sinopec said Thursday its net profit in the first half of the year was expected to drop by more than 50%. The company attributed the fall to big losses in its refining business.
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