Seismic waves traveling between Earth’s poles move faster than those moving east-west, and now scientists think they may know why.

地震波沿地球南北两极传播比沿东西方向传播的要快。 现在，科学家们认为已找到了这一问题的原因所在。

youdao

However, countries along Africa's east coast had a number of hours to brace themselves for the arrival of the giant waves.

然而，沿非洲东海岸的一些国家却在巨浪到来前几小时就做好了准备。

youdao

When the waves are short, they go with the jet's flow and the resultant wiggling heads downstream to the east.

当波长短时，他们与急流相向流动，所形成的振荡沿下向东移动。

youdao

They carried takeout coffees, walked their dogs, and took pictures of one another standing in front of the crashing East River waves with their cellphones.

WSJ: Sandy Hits Coast, Floods New York

Since then, it has been the basis for waves of migrations from the Near East into Europe, most notably the founding and expansion of Ashkenazi Jewish populations.

FORBES: Portrait of an Irish Genotype

For some races, the combination of water flowing west and wind blowing east creates a series of choppy five-foot waves.

WSJ: Before America's Cup Capsize, Concerns About Safety