推导了岩石导电效率与岩石中孔洞大小、裂缝宽度以及导电效率与孔洞大小、喉道直径之间的关系式。

Relationships between the rock electrical conduction efficiency and the cave size, fracture width, and throat diameter are presented.

youdao

动物和人体研究都表明，一般而言，体育活动可以增加脑容量，并可减少与衰老有关的脑部白质和灰质孔洞的数量和大小。

Studies in animals and people have shown that physical activity generally increases brain volume and can reduce the number and size of age-related holes in the brain's white and gray matter.

youdao

在这些实验中，他们将头发一般粗细的管子，从患者头颅顶部约硬币大小的孔洞伸入。

In the experiments, they thread a tube about the width of a hair through a hole the size of a quarter on top of a patient's skull.

youdao