Definition
to unexpectedly attack or harshly criticize an individual out of the blue
突然袭击（或批评）某人
During the meeting, John turned on Mary with a sudden outburst, shocking everyone.
在会议中，John突然对Mary大发雷霆，震惊了所有人。
Many fans expected his campaign to continue, but he unexpectedly turned on the media with harsh criticisms.
许多粉丝本以为他的竞选活动会继续，但他出乎意料地对媒体进行了严厉批评。
She had always been his supporter, but during that argument, he turned on her opinions with harsh words.
她一直支持他，但在那次争论中，他却用尖锐的言语抨击了她的观点。