如:He believes in ancient myths. 他相信古代神话。如:He believes deeply in the need for regular exercise.他深信有必要经常锻炼身体。
“深信不疑”，汉语成语，形容对事对人非常相信，没有半点怀疑。例句:他对大蒜的医学功效深信不疑。He had an invincible faith in the medicinal virtues of garlic.
