This aspect is to reduce the pipeline pressure loss, the other is to avoid the path contraction obstacle to the mechanical cleaning pipelines.

这一方面是为了减小管线的阻力损失，另一方面是为了避免通径收缩后给机械清扫管线造成障碍。

youdao

Recognizing the need to pursue growth-oriented policies that support demand and recovery, the United States will calibrate the pace of its fiscal consolidation by ensuring that its public finances are placed on a sustainable long-run path so that a sharp fiscal contraction in 2013 is avoided.

WHITEHOUSE: The Los Cabos Growth and Jobs Action Plan