Over the past 20 years, the Internet has gradually become a dominant feature of our lives.

在过去的20年里，互联网逐渐成为我们生活中的一个主导特征。

The ocean's dominant feature, extending up to two miles deep and as much as 1,200 miles wide, is the Antarctic Circumpolar Current, by far the largest current in the world.

这片海洋的主要特征是南极绕极洋流，它深达2英里，宽达1200英里，是目前世界上最大的洋流。

It must not be forgotten that this system of land tenure became the dominant feature of a large section and gave a decided bent to the economic and political life of America.

千万不要忘记，这种土地保有权制度成为大部分地区的主要特征，并对美国的经济和政治生活产生了决定性的影响。