They are not always accurate. Several factors can reduce their accuracy.

它们并不总是准确的。有几个因素能降低它们的准确性。

youdao

The greatest problem in using intelligence tests for the purpose of prediction is that no dependable criterion of their accuracy exists.

用智力测试来预测的最大问题是没有可靠的标准来衡量它们的准确性。

youdao

Because of their accuracy, the reports were popular.

由于其准确性，这些报告很受欢迎。

youdao

Over the centuries,scientific thinkers worked to develop these devices and improve their accuracy and complexity.

VOA: special.2010.09.29

Of course that depends on the accuracy of the self- reports that people are making on their own, and as you'll see in just a minute, there are errors in that and some of you may have experienced some of that yourself in keeping the dietary records.

当然这还取决于每个人自己完成的,个体调查的准确性,正如你马上会看到的,这其中有误差,而你们也可能经历过一些,你自己保存膳食记录时的误差

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Libyans largely praise NATO pilots for their accuracy, dismissing tales of civilian casualties as propaganda.

ECONOMIST: Libya

Data suggested death rates there were double that of other centres, but experts have questioned their accuracy.

BBC: England

The experts focused on predicting riots, deaths and disease outbreaks and say their accuracy was between 70%-90%.

BBC: News headlines used to predict future events