1.In 50,000 years earth will enter into another glacial period regardless of current global warming effects.

不管目前全球变暖效应如何，五年后地球将进入另一个冰川期。

2.Within that, you have cycles of “glacial periods” and “interglacial periods”.

其，你有“冰期” 和“间冰期” 循环。机翻

3.Over the past two million years, colder glacial periods have alternated with warmer interglacial periods.

过 200 年里， 较冷冰期与较温暖间冰期交替出现。机翻

4." We obviously don't have thermometers in the glacial period, so we have to instead look for these kinds of stand-in indicators."

“显然，冰川时期我们没有温度计，因此我们必须寻找替代指示器。”

5.So let’s look at the Pleistocene Epoch — the most recent glacial period.

那么让我们来看看更新世时期——最近冰川期。机翻

6.6 million years ago, the ice caps expanded even more, and the Earth entered a glacial period.

260年前， 冰盖进一步扩大，地球进入冰河期。

7.Imagine how much surviving the cold would have been a problem back in a glacial period.

想象一下，冰川时期， 如何寒冷幸存下来是个问题。机翻

8.Glacial periods over the past 6 million years promoted the selection of a set of genes responsible for the metabolism and neurohormonal regulation in cold conditions.

过 600 年冰期促进了一组基因选择，基因负责寒冷条件下新陈代谢和神经激素调节。

9.Just such an influx may have happened about 12,800 years ago, helping to set off a thousand-year glacial period called the Younger Dryas.

大约 12,800 年前可能就发生了样涌入，帮助引发了称为新仙女木期千年冰川期。机翻

10.Somehow, Gigantopithecus managed to survive the first few of these glacial periods, but 100 thousand years ago, in the Middle Pleistocene, something changed.

不知何故， 巨猿设法冰河时期前几个时期幸存下来，但 10 年前更新世，情况发生了变化。机翻

11.The decrease in the rain-and snow-fall since the close of the glacial period in the Sierra is much less than is commonly guessed.

自塞拉利昂冰川期结束以来降雨和降雪量减少比通常猜测要少得多。机翻

12.Glacial periods are colder and have a greater ice sheet presence, while the interglacial periods are warmer and more like the Earth is now.

冰川期更冷， 冰盖更大， 而间冰期更暖，更像现地球。机翻

13.All the Sierra rivers and their tributaries in these high regions are thus lost every winter, as if another glacial period had come on.

因此，每年冬天，高地所有塞拉利昂河及其支流都消失了， 仿佛又一个冰河期来临了。机翻

14.We know that during this glacial period, many animal and plant species sought shelter in Europe's three warmer southern peninsulas, Iberia, Italy, and the Balkans.

我们知道， 个冰河时期，许多动植物物种欧洲三个较温暖南部半岛、伊比利亚、意大利和巴尔干半岛寻求庇护。机翻

15.When the most recent glacial period ended around 11,700 years ago, things got warmer and drier, and the swamps and lakes that Castoroides depended on became more scarce.

当最近一次冰川期大约 11,700 年前结束时，天气变得更加温暖和干燥， Castoroides 赖以生存沼泽和湖泊变得更加稀少。机翻

16.Next to the Cathedral Rocks on the south side towers the Sentinel Rock to a height of more than 3000 feet, a telling monument of the glacial period.

南侧大教堂岩石旁边耸立着高达 3000 多英尺哨兵岩石，是冰河时期一座纪念碑。机翻

17.Perhaps more than a mile in average depth has the range been thus degraded during the last glacial period, -a quantity of mechanical work almost inconceivably great.

最后一次冰河时期，山脉平均深度可能超过一英里，因此退化了——大量机械工作几乎大得令人难以置信。机翻

18.As an example, I have attempted to show how potent has been the influence of the Glacial period on the distribution of the same and of allied species throughout the world.

作为一个例子， 我试图说明冰河时期对世界各地相同物种和近缘物种分布影响有多大。机翻

19.It is hard without long and loving study to realize the magnitude of the work done on these mountains during the last glacial period by glaciers, which are only streams of closely compacted snow-crystals.

如果不进行长期而热情研究，就很难认识到冰川最后一次冰河时期对山脉所做工作重要性，冰川只是紧密压实雪晶流。机翻

20.At the close of the last glacial period, the middle and foot-hill regions also abounded in lakes, all of which have long since vanished as completely as the magnificent ancient glaciers that brought them into existence.

末次冰川期结束时，山和山麓地区还盛产湖泊，但湖泊早已完全消失，就像孕育它们壮丽远古冰川一样。机翻