这论难可以通过对比分析来预测。
These difficulties can be predicted by contrastive analysis.
通过对比分析，优选出适合于该区块的钻头类型。
Through comparative analyses, suitable types of bits for the area are selected.
通过对比分析，改造后led路灯照明节能效果明显。
Through contrastive analysis, the LED street lights have remarkable energy conservation effect.
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