draw lessons from; guard against making (/repeating)the same mistakes; serve as a grave warning; take warning from
❍ 全党同志对于这几次骄傲，几次错误，都要～。(《毛泽东选集》902) Comrades throughout the Party should take warning from these instances of pride and error.
引为鉴戒yǐn wéi jiān jiè
把以往失误的教训当作今后的鉴戒，以避免再犯类似的错误。learn a lesson, take warning from sth., draw lesson from