A fine region this for study of glacial action in mountain-making.

这是研究造山过程中冰川作用的绝佳区域。

Glacial action even on this lofty summit is plainly displayed.

即使在这座崇高的山顶上， 冰川作用也清晰可见。

Had another rich ramble. Pushed northward beyond the forests to the head of the general basin, where traces of glacial action are strikingly clear and interesting.

有另一个丰富的漫步。向北推到森林之外的一般盆地的头部，那里的冰川活动痕迹非常清晰和有趣。

A similar blurred condition of the superficial records of glacial action obtains throughout most of Oregon, Washington, British Columbia, and Alaska, due in great part to the action of excessive moisture.

在俄勒冈、华盛顿、不列颠哥伦比亚和阿拉斯加的大部分地区，冰川作用的表面记录也出现了类似的模糊情况，这在很大程度上是由于过度潮湿的作用。