美国西部

It is a myth that gunslingers in the American west cut notches in the handle of their pistol for each man they shot.

有种传说，美国西部的枪手们每杀死一个人就在他们的枪柄上刻下一个V形记号。

Doing that in many of the forests of the western US is like building homes on the side of an active volcano.

在美国西部的许多森林里那样做就像在活火山边上建房子一样。

Wildfires are becoming an increasing menace in the western United States, with Southern California being the hardest-hit area.

森林大火对美国西部的威胁越来越大，其中南加州是受灾最严重的地区。

Now there are some pretty interesting caves in parts of the western United States, especially in national parks.

现在在美国西部的一些地方有一些非常有趣的洞穴，尤其是在国家公园里。

The dry mountain ranges of the western United States contain rocks dating back 440 to 510 million years, to the Ordovician period, and teeming with evidence of tropical marine life.

美国西部干燥的山脉包含了距今4。4亿至5。1亿年前的奥陶纪岩石，其中充斥着热带海洋生物生存的迹象。