flat out

US /flæt aʊt/
UK /flæt aʊt/
"flat out" picture
1.

全力以赴, 全速

as fast or as hard as possible

:
He worked flat out to finish the project on time.
全力以赴地工作,以按时完成项目。
The car was going flat out down the highway.
汽车在高速公路上全速行驶。
2.

直截了当, 断然

directly and clearly; without hesitation or reservation

:
She told him flat out that she wasn't interested.
直截了当地告诉他她不感兴趣。
He denied the accusation flat out.
断然否认了这项指控。