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。
However, in the late 1980s, some scientists were exploring Devil' s Hole, which is basically an extensive water-filled cave, far from the ocean, in Nevada2, in the western United States.
然而，在20世纪80年代后期，一些科学家在美国西部的内华达探索魔鬼洞，这基本上是一个广阔的充满水的洞穴，并且远离海洋。
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。
They're a type of rodent who, who burrow in the ground in the grasslands of the western United States and Mexico.
它们是一种啮齿类动物，在美国西部和墨西哥草原的地上挖洞。
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。
A big worry is that these transplanted megafauna might devastate plants and animals that are native to the western United States.
最让人忧心的就是这些转移过来的巨型动物可能会毁灭美国西部一些土生土长的动植物。
Importing African cheetahs to the western United States could, in theory, put the pronghorn back onto its natural evolutionary trajectory according to these biologists.
从理论上讲，把非洲猎豹引进美国西部，可以让叉角羚重新回到生物学家所说的自然进化轨道上。
Now it is generally believed that the sample from Devil's Hole corresponds to variations in local climate, in the western United States, rather than global climate changes.
现在人们普遍认为魔鬼洞的样本与美国西部当地气候的变化有关，而不是全球气候的变化。
Yeah, do you know the western United States?
是的。你知道美国西部吗？
The western United States is a great place for a road trip.
美国西部是公路旅行的好地方。
A lone cow saunters across an open road in the western United States.
一头母牛独自漫步在美国西部的一条公路上。
OK, well this is our first package. This goes to the western United States.
好的。这是我们的第一旅游套餐。它是去美国西部的。
A big state university in the western United States will serve as our example.
一所位于美国西部的大型州立大学将会作为我们的典例。
Arizona is located in the Western United states as one of the Four Corners states.
亚利桑那州位于美国西部的一个国家的四个角落。
A hired man, especially in the western United States, who tends cattle and performs many of his duties on horseback.
牛仔尤指美国西部地区受雇来照料牛群并骑于马上完成其大部分工作的男子。
Tropical wildfires are different from the ones that happen in temperate woodlands, for example in the western United States.
热带地区的森林野火与发生在温带疏林——比如美国西部——的森林野火有所不同。
The shifting sands have led to a sharp increase in sandstorms — the grit from which can travel as far as the western United States.
这些飞沙导致了沙尘暴的急剧增长——这些沙尘甚至可以飞到美国西部去。
Pebble Beach Golf Links is one of the seven well-known courses and probably the most famous course in the Western United States.
卵石滩高尔夫球环节，是一个最知名的七个课程，大概是最有名的，当然在西部美国。
This belief inspired Smith's desire to establish Zion, the kingdom of God, which was to be built somewhere in the western United States.
正是在这一信念鼓舞下，史密斯渴望建立神圣王国锡安，一个曾存在于美国西部的地方。
In the 19th century, Guangdong was also the major port of exit for labourers in south-east Asia and the western United States and Canada.
在19世纪，也是广东省主要港口的出口劳动者在东南亚和美国西部和加拿大。
Covering more than 2, 000 acres, the park features an unusually isolated stand of Bigtooth Maple, a variety native to the western United States.
它占地超过了2,000亩，园区是一个生长着不常见大齿叶枫树的孤岛。这种枫树是原产于美国西部枫树的变种。
The oldest preserved shoe remains, dating to roughly 10, 000 years ago from the western United States, are simple sandals woven of plant fibers.
现存最古老的鞋发现于美国西部，出现时间粗略地定位在距今1万年以前，它是简单的由植物纤维编织而成的凉鞋。
Only western cougars still live in large enough numbers to maintain breeding populations, and they live on wild lands in the western United States and Canada.
只有西部美洲狮的存在数量还足以维持种群繁衍，它们生活在美国西部和加拿大的荒野里。
Finally, the formulas of PGA and RMS accelerations attenuation dependent on the rupture direction of the seismic source are presented for the Western United States.
文章最后给出了美国西部考虑震源破裂方向的地震动峰值加速度和均方根加速度的衰减关系。
Finally, the formulas of PGA and RMS accelerations attenuation dependent on the rupture direction of the seismic source are presented for the Western United States.
文章最后给出了美国西部考虑震源破裂方向的地震动峰值加速度和均方根加速度的衰减关系。
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