It's against the law to post a public notice calling someone a coward for refusing to accept a challenge to duel.

因某人拒绝接受一项决斗而在大庭广众下称呼某人是懦夫是违法的。

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I challenge him to a duel.

我向他挑战进行决斗。

youdao

I challenge you to a duel.

我挑战你来一场决斗。

youdao

Separately Wednesday, Otellini addressed its smaller competitor, Advanced Micro Devices, which today took out full page ads in national newspapers to challenge Intel to a "dual core duel" to see whose chips are faster.

FORBES

Separately Wednesday, Otellini addressed its smaller competitor, Advanced Micro Devices (nyse: AMD - news - people ), which today took out full page ads in national newspapers to challenge Intel to a "dual core duel" to see whose chips are faster.

FORBES: Chief Executive Paul Otellini