示警

jǔ hóng pái shì jǐng

举红牌示警

raise an alarm by holding up a red card

shì jǐng biāo zhì

示警标志

warning marker

míng qiāng shì jǐng

鸣枪示警

fire a warning shot

míng dí shì jǐng

鸣笛示警

give a warning by whistle

jǐng fāng kāi qiāng shì jǐng yāo qiú zuì fàn fàng qì duì zhì

警方开枪示警要求罪犯放弃对峙。

The police fired warning shots and asked the criminals to give up the confrontation.

tā men dǎ suàn fàng huǒ shì jǐng

他们打算放火示警。

They plan to fire for warning.