The product was withdrawn after warning from the most eminent scientific quarters.由于科学界最权威人士提出警告，该产品被取消了。I'd be shirking my duty if I didn't warn him.如果我没有对他提出警告，那就是逃避责任。The policeman let the driver off with a caution.警察向司机提出警告后就让他走了。The policeman gave him a caution for speeding.警察因他超速行驶向他提出警告。