As they travel across the Sahara, they create the biggest of all sand storms.

它们穿越撒哈拉沙漠时，造成了世界上最大的沙尘暴。

During a sand storm, camels can close their nostrils, so they don't breath in too much dust.

在沙暴期间骆驼能够闭上其鼻孔这样就不会吸进太多尘沙。

This, they say, could have resulted from an increase in the number of sand storms caused by climate change.

这主要是由持续干旱导致的沙尘暴引起的。

And Palaeocastor lived in grasslands that grew on sand dunes, which occasionally could have generated big sand storms.

Palaeocastor 生活在沙丘上的草原上，沙丘偶尔会产生大沙尘暴。

On these, he often noticed plant leaves completely covered in dust that had been carried there by sand storms from the Sahara desert.

那会儿他经常注意到，植物的叶子被撒哈拉沙漠的沙尘暴带到那里的灰尘完全覆盖。

The rover lost the ability to fully control one of its front wheels in 2005. It was almost disabled in two sand storms.

2005年，机遇号失去了完全操控其中一个前轮的能力。2场沙尘暴让机遇号近乎报废。

The Burj Khalifa stands more than half a mile high.It's located in Dubai, United Arab Emirates, a place that's no stranger to sand storms.

哈利法塔有半英里多高。它坐落于阿联酋的迪拜，这是个对沙尘暴并不陌生的国家。

In this case, the first two " frequent storms" and " sand storms" are correct, but " frequent sand storms" is wrong because it has an extra word.

在这种情况下，前两个“频繁的风暴”和“沙尘暴”是正确的，但“频繁的沙尘暴”是错误的，因为它多了一个单词。

Sometimes I don't write full answers, for example, the answer was " frequent sand storms" but I wrote " frequent storms" , is it an incorrect answer?

有时候我没有写出完整的答案，比如，答案是“频繁的沙尘暴”，但是我写的是“频繁的风暴”，这是错误的答案吗？

Sand storms often wiped out all signs of the route; hunger and thirst did many a band of wagoners to death; but the lure of the game and the profits at the end kept the business thriving.

沙尘暴经常摧毁路线的所有标志；饥渴使许多车夫丧命。但游戏的诱惑和最终的利润让生意蒸蒸日上。