0 to follow something or be shown the way by something -- 遵守,依照,按照
1 to base an opinion, decision, or judgment on something -- 根据…作判断(或决定)
What do you go by when you're deciding whether or not to employ someone? 你决定雇用谁或者不雇用谁的依据是什么?
Going by what she said yesterday, I would say she's about to resign. 从昨天她说的话来判断,我敢说她要辞职了。
If past experience is anything to go by, he'll completely ignore our suggestions and then change his mind at the last minute. 根据以往的经验来看,他肯定会把我们的建议全然置之脑后,在最后一刻改变主意。