It must be hard for her, bringing up four children on her own.

她一个人抚养四个孩子一定很艰难。

《牛津词典》

The idea is to divide up the country into four sectors.

该观点是将国家一分为四。

《柯林斯英汉双解大词典》

The rabbit got up, took four hops and turned around.

兔子直起身子，蹦跳了4下，然后转过身。

《柯林斯英汉双解大词典》

It must have fourteen lines, with three groups of four lines that set up the subject or problem of the poem.

VOA: special.2010.01.06

We've probably had four major periods in American history of there's one other picture I wanted to put up.

在美国历史上,我们大约经历了四个时期,在我想贴的另一张图片上

耶鲁公开课 - 美国内战与重建课程节选

I've got two states here, three states here, two here, I need four, and if I can come up with these bonds, four, by the Hund rule I'd fill them like this.

我们已经有2个状态在这里，3个在这里，2个在这里，我需要4个，如果我能想到这些键，四个，通过洪特规则，我们就能像这样排布。

麻省理工公开课 - 固态化学导论课程节选

But we regularly saw Guus Hiddink play in this tournament with three at the back, three in midfield and four up front.

BBC: Attack best form of defence

Els was four up after the first round and reached as much as seven up after the 10th against Romero, who finished third in the Open at Carnoustie.

BBC: Cabrera downs Casey at Wentworth

Hardware wise, the Nexus does look incredibly thin and sleek, and while there's not a slew of buttons (those four up front are clearly touch sensitive), there is a dedicated volume rocker along the side.

ENGADGET: Exclusive: first Google Phone / Nexus One photos, Android 2.1 on-board