为……发誓：表示对某人或某事情的真实性或承诺而发誓。
Can you swear for his honesty?
你能担保他诚实吗？
His friends will swear for his integrity.
他的朋友愿意为他正直的品格作担保。
I could call many people to swear for this method.
我可以请许多人为这个方法担保。
On average,students using swear words were able to keep their hand in the water for about two minutes.
VOA : special.2009.08.18
The researchers note that swear words have existed for hundreds of years.
VOA : special.2009.08.18
The eagerness of Iran's rulers for a nuclear capability, which they swear is only for civilian use but which most outsiders reckon would lead inexorably to a bomb, is shared by nearly all Iranians, even those on the streets, as a national birthright in a hostile world.
Still, it took the House two tries, under Democratic leadership in 1994 and under Republicans in 1995, to swear off golfing for other people's charities.
Surprising good customers with a sudden, unexpected discount or upgrade would go miles toward making them swear by a brand for life, he believes.