How long have you collected shells? I have collected shells for three and a half years.

你收集贝壳多长时间了？我收集了三年半。

youdao

After three and a half years, she said yes, and within weeks she was transformed.

在三年半之后，她同意了，之后在几周之内她就有所改变了。

youdao

Kepler will watch them all for three-and-a-half years and wait for the light from any of them to dim ever so slightly. That could be the sign of a planet passing in front of its sun.

开普勒号将在轨道上运行三年半，等待着观测这十万行星光线的每一丝微乎其微的变化——那也许就是有行星从恒星前经过的信号。

youdao

After three and a half years of fighting, hundreds of thousands of Union and Confederate soldiers had been killed or wounded.

VOA: special.2009.12.03

This Cambridge History of Food talks about three separate primary phases in human food evolution: one beginning a million and a half years ago, another about 700,000 years ago, and then the 10,000 year ago one that I talked about just a moment ago.

剑桥饮食史》描述了,人类饮食结构演化过程中的三个不同阶段,其一,始于一百五十万年前,其二,距今约七十万年,其三,距今一万年,我们刚讨论过了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.

VOA: special.2009.09.08

And this administration has stood by our close ally, Poland, throughout the past three and a half years and worked with the Poles on numerous fronts -- both national security matters and global economic matters.

WHITEHOUSE: Press Briefing

And we've had to spend three and a half years recovering and pushing back.

WHITEHOUSE: Remarks by the President at a Campaign Event

Romney and Ryan have their hands free to blast the status quo, focus on the policy errors of the past three and a half years, and explain what they would do to fix the mess we are in.

FORBES: Why Obama/Biden Cannot Possibly Win the Presidential Debates