Definition
to persist in adhering to what you committed to in a decision, agreement, or pledge
继续遵循，信守（决定、协议或承诺）
Even in the face of difficulties, he decided to stand by his commitments.
即使面对困难，他仍决定信守承诺。
We need to stand by this agreement, no matter what happens.
无论发生什么，我们都必须坚守这项协议。
She will surely stand by her decision because she believes it is the right thing to do.
她一定会坚守自己的决定，因为她相信这是正确的选择。
to maintain the belief that your previous statement is correct
持续坚信，坚持（自己的说法）
Despite facing criticism, he still stands by his comments.
尽管面对批评，他仍然坚持自己的评论。
She stands by her position on this issue and has no intention of changing it.
她坚持自己对这个问题立场，并且无意改变。
Even with opposing evidence, he stands by his viewpoint.
即使有反对的证据，他仍然坚持自己的观点。