V to promise to abstain from something 保证不做
to swear off drink
Don't swear off eating anything but boiled gruel just yet.
不过你也不必发誓再也不吃任何东西，而只是吃些粥。
If one spouse quit smoking, the other was six to eight times more likely to swear off cigarettes, too.
如果一方戒烟了，另一方也可能会有比别人6-8倍的决心戒掉香烟。
Take Two Chocolates And Call me in The Morning: Participants in an aspirin study who couldn't swear off chocolate helped researchers find some sweet science.
吃两块巧克力，早上叫我起床：参与阿司匹林研究的参与者也不能发誓说巧克力帮助研究者找到了甜蜜的科学。
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