One forth is a proper fraction.

四分之一是一个真分数。

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They gave the four children one forth of a cake each.

他们给四个孩子每人四分之一蛋糕。

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Pairs of opponents hit the ball back and forth until one winner emerges from all who entered.

一组组对手来回击球，直到所有参赛者中出现一名胜利者。

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One of the hands keeps a flat hand shape and it just kind of lightly moves back and forth as if it were a flickering image on a screen."

VOA: special.2011.04.13

It was from out the rind of one apple tasted, that the knowledge of good and evil, as two twins cleaving together, leaped forth into the world.

这是从那个被咬的苹果皮外来的，善恶的知识，像一对双胞胎分开但又在一起，一起在人间前进。

耶鲁公开课 - 弥尔顿课程节选

What I may decide about, what comes to the Faith Council is advancing some of the priority areas that the President has set forth one of which is interfaith cooperation.

我能够决定的，信仰委员会所负责的,是推进一些重点领域,一些总统提出来的重点领域的发展,其中一点就是跨信仰合作。

普林斯顿公开课 - 人性课程节选

The trouble is each child would get three fourths of their inheritance in company stock, and one forth in other assets.

FORBES: Inheritance Equalization: Planning ahead now to reduce the burden for your kids later

Nearly one forth of all premium television users are satellite users.

ENGADGET: blogger-avatar

They support a weaker proposal than the one put forth in the Senate's version of the energy bill, which would raise the standard from 25 miles per gallon to 35 mpg by 2020.

FORBES: Magazine Article