It is actually quite difficult to find reliable statistics on the issue for many schools.

对于许多学校来说，要找到关于这个问题的可靠统计数据是相当困难的。

youdao

Since it is largely unregulated, reliable statistics are hard to come by.

由于它大部分都不受监管，可靠的统计数据是很难得到的。

youdao

Lack of reliable statistics and unpronounceable names of diseases have all hampered efforts to bring them out of the shadows.

缺乏可靠的统计和难以正确发音的疾病名称均让这些疾病难以步出阴影。

youdao

There are no reliable statistics on the number of turtles in Kenyan waters or estimates of the number of turtles killed each year.

VOA: standard.2010.07.15

It will do so mostly by collecting new and reliable statistics and by presenting annual country-by-country reviews.

ECONOMIST: So what was achieved by ten days of talking?

But there are no reliable statistics at the state or local level on the share of CPOs in the population.

ECONOMIST: Political polls

Whether you like your economics beautiful, like the 2011 Novel Laureates, or messy, like John Maynard Keynes, you don't get far without reliable statistics.

BBC: The Nobel prize, and the ONS