It was as though for a while I waded in a main current of time.

有一阵子我好像涉水在时间的主流中。

This induction of an emf that opposes the main current is called self-inductance.

这种与主电流相反的电动势的感应 称为自感。

And it's negative, because the induced emf is in the opposite direction of the main current.

它是负的，因为感应电动势 与主电流方向相反。

Thus Southern industries were given easy outlets to the markets of the nation and brought within the main currents of national business enterprise.

因此，南方工业很容易进入全国市场，并被纳入全国商业企业的主流。

This marked the doom of the small farmer, swept Arkansas into the main current of planting politics, and led to a powerful lobby at Washington in favor of admission to the union, a boon granted in 1836.

这标志着小农的厄运，将阿肯色州卷入了种植政治的主流， 并在华盛顿引发了一个强大的游说团体， 支持加入联邦，这是 1836 年授予的一项恩惠。

In the market places the farmers from the countryside learned of British policies and laws, and so, mingling with the townsmen, were drawn into the main currents of opinion which set in toward colonial nationalism and independence.

在市场上，来自农村的农民了解了英国的政策和法律，因此，他们与市民混在一起，被卷入了走向殖民民族主义和独立的主流舆论潮流。