swear by
US /swer baɪ/
UK /swer baɪ/

1.
非常相信, 極力推薦
to believe strongly in the effectiveness or truth of something
:
•
My grandmother swears by this herbal remedy for colds.
我奶奶非常相信這種治療感冒的草藥。
•
Many chefs swear by fresh, local ingredients.
許多廚師非常推崇新鮮的本地食材。