The police officer pressed two passersby into service to warn off traffic.

警察临时将两名路人找来协助指挥交通。

youdao

In the fall Jean put a yellow collar around Frankie's neck to warn off hunters.

秋天时，琼给弗兰基套上个黄脖圈，告诫猎人不要猎杀它。

youdao

So the researchers wanted to check ifbees' colours were the only thing that helped to warn off predators.

所以研究者想要检验一下蜜蜂的颜色是否是帮助提醒捕食者唯一途径。

youdao

Monday afternoon, Thai soldiers fired shots in the air to warn off protesters throwing stones, boards and water bottles at firefighters.

VOA: standard.2009.04.13

As Yemen battles al-Qaida in the Arabian Peninsula, a Southern separatist movement, and tries to wrap up a six-year old war in the north, Western governments warn their citizens to stay out of the country, scaring off tourists and investors.

VOA: standard.2010.04.20

At earlier stages in Bosnia's war, when Muslim strongholds like Gorazde or Bihac had been on the verge of falling, America had worked (without the promise of ground troops) to galvanise its allies insisting that battle-plans be drawn up, and threats of bombing be issued, so as to warn off the Serbs.

ECONOMIST: Washington chronicle

In fact, we heard today that another moderate cleric, a very senior moderate cleric in the southern city of Kandahar was gunned down, and this is apparently part of a tactic that's intended to warn people off from cooperating with the government of President Hamid Karzai, warn people off from cooperating with the United States and NATO troops who are here.

NPR: Roadside Bomb Kills Four Soldiers in Afghanistan

This is not the only initiative on the menu to warn consumers off certain foods.

ECONOMIST: Junk food