impact-modified grade 冲击性改进级
modified grade
修改后的成绩
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This is due to lower throughput capacity at Goldstrike in Nevada as autoclaves are modified, along with mining in lower-grade ore zones at several mines.
FORBES: Barrick Gold Reports 4Q Net Loss; CEO Pledges Disciplined Spending
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