柯林斯词典swear by (swearing,swore,sworn,swears) 1. PHRASAL VERB If you swear by something, you believe that it can be relied on to have a particular effect. 信赖 (某物的效用)[非正式] Many people swear by vitamin C's ability to ward off colds. 很多人深信维生素C能预防感冒。 返回 swear by