The unique river valley topography, mountain range alignment, and local weather characteristics in Yunnan Province determine the geographic distribution pattern of K. yunnanensis.

云南特有的流域地形、山脉走向及所形成的小气候特点决定了云南紫胶虫在云南的地理分布格局。

youdao

Moreover, the topography there resembles that of metropolitan Phoenix – a valley surrounded by mountains that trap the dirty air within.

而且这里的地形类似菲尼克斯，也是群山环绕的峡谷地形，使肮脏的空气汇聚于此。

youdao

Derived from Shuttle Radar Topography Mission (SRTM) data, the white line around the valley in the top image approximates the Lake Suguta shoreline when water levels were at their highest.

根据航天飞机雷达地形测绘数据，上图中山谷周围的白线近似于苏加塔湖水位最高时的湖岸线。

youdao

In the beginning, they put antennas on hilltops, then strung coaxial cable lines down to homes in the valley where most people, blocked by topography, had trouble receiving broadcast signals.

FORBES: Big Broadband's Secret Plan to Deliver Wildly Popular Content and Apps to Happy Consumers