warnings是什么意思？

The Scottish Environment Protection Agency has issued more than 35 flood warnings covering several regions, as Scotland continues to clean up after Storm Frank hit the country last Wednesday.

Journalist Sarah Scoles reports that NASA currently tracks about 24,000 objects in space, and in 2016 the air Force had to issue 3,995,874 warnings to satellite owners alerting them to a potential nearby threat from another satellite or bit of debris.

That is why government has historically intervened, banning advertising, imposing health warnings and punitive duties.