cast doubt on

US /kæst daʊt ɑːn/
UK /kæst daʊt ɑːn/
"cast doubt on" picture
1.

质疑, 使人怀疑

to suggest that something may not be true, reliable, or valid

:
The new evidence cast doubt on the witness's testimony.
新证据证人的证词提出质疑
His inconsistent statements cast doubt on his credibility.
他前后矛盾的陈述使他的可信度受到质疑