1. 对...发誓, 信赖：masonry beam 圬工梁 | swear by 对...发誓, 信赖 | nominal band [信]标称频宽

2. 发誓：swear black is white 颠倒黑白 | swear by 发誓 | swear for 保证

3. 以(...名义)起誓, 以(人格)担保; [口]非常信赖; 肯定, 确定：swear at 咒骂; [俚](颜色)和...完全不调和 | swear by 以(...名义)起誓, 以(人格)担保; [口]非常信赖; 肯定, 确定 | swear for 保证, 担保

4. 极其信赖：自责:beat oneself up | 极其信赖:swear by | 成功:make it

1. 极其信赖;对…推崇备至
If you swear by something, you believe that it can be relied on to have a particular effect.

e.g. Many people swear by vitamin C's ability to ward off colds.
许多人深信维生素C能预防感冒。