报警、引起注意

    Raise the red flag字面解释是“举起红旗”，这是什么意思呢？请看对话：

    A: Where did you buy this bottle of wine?

    B: I bought it online. Anything wrong?

    A: It tastes a bit sour, unlike the previous wines I bought from the Silver Oak Wine Cellars.

    B: Are you saying it’s fake?

    A: I’m not sure. But I am raising the red flag about its authenticity.

    B: Raise the red flag?

    A: To “raise the red flag” is to alert as to potential danger or trouble ahead, as red flags are often literally used to warn people of possible peril.

    B: In Chinese we have the similar saying of “switching on the red light.”

    A: All right. Remember to be cautious when you buy food or beverages online next time.

    B: Advice taken.

    记住了吗？Raise the red flag就是“报警、引起注意”。