An old saying has it that half all advertising budgets are wasted—the trouble is, no one knows which half.

有句老话说，一半的广告预算都浪费了——问题是，没人知道是哪一半。

youdao

The number of IFC projects rose 18 percent to 440, of which half were in IDA countries.

国际金融公司的项目数增加了18%，增至440个，其中半数在IDA借款国。

youdao

Work only a half a day; it makes no difference which half -it can be either the first 12 hours or the last 12 hours.

每天只工作半天，前12小时与后12小时并无太大差别。

youdao

So far it has proven effective at preventing the disease in half of those vaccinated which is more than ever before.

VOA: special.2009.12.07

And nearly not even a half of them graduate high school, which is like, a terrible injustice, a complete injustice.

其中不到一半能高中毕业，这非常不公正，完全的不公正。

哈佛公开课 - 幸福课课程节选

This data comes half from the Italian league, which is pretty good and half from the French league, which sucks.

这些数据一半来自强队意大利队,一半来自弱队法国队

耶鲁公开课 - 博弈论课程节选

In 1980 China's median (the age at which half the population is younger, half older) was 22.

ECONOMIST: Demography

Perhaps, tentatively, the suburbs, in which half of Americans live, are to blame.

ECONOMIST: The economy

They can sometimes use a single straw to produce a dozen frozen embryos, of which half could become viable calves.

WSJ: Those Who Root for the Bull