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

The findings demonstrated that: Strength of muscles, especially power and contraction velocity, are declined with aging. It is directly associated with loss of daily living and self-care abilities.

经分析得出结论：肌肉的力量，尤其是爆发力和收缩速度随年龄增长而衰退，而这种衰退与老年人的活动能力和自理能力的丧失直接相关。

youdao

In this microscopic view of a recent myocardial infarction, there is extensive hemorrhage along with myocardial fiber necrosis with contraction bands and loss of nuclei.

这是心肌梗死早期镜下图，沿着坏死的心肌纤维有广泛的出血。坏死的心肌纤维可见横纹但核消失。

youdao

We are emerging from the worst recession since the Great Depression -- catastrophic contraction of the economy, catastrophic job loss, the likes of which most people alive today have never experienced.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney

It is expected to produce a contraction of the native European population of between 100 and 150 million - a loss of one-third - by 2050.

CENTERFORSECURITYPOLICY: Farewell to Europe