out of the blue
中级 (B1) informal
Something that happens with no warning at all.
"Out of the blue, she called me after five years of silence."
在语境中听
How did Earth form?: Crash Course Geology #2
CrashCourse · 7:05
out of the blue.
“Get over it”, “hook up”, “blow away”: 10 Everyday English Expressions
Adam’s English Lessons · engVid · 2:48
Basically, start suddenly, out of the blue.
What kids know about motivation (and we don't) | Betsy Blackard | TEDxClaremontGraduateUniversity
TEDx Talks · 13:14
a thought struck me, out of the blue:
Charles "AIR" Jourdain
UFC · 27:37
Black for Andre Ule out of the blue
Britain & Ireland Tours with Lisa Friend & Charlie Rawson
Rick Steves Travel Talks · 78:51
Out of the Blue and then walking four