她发誓在哥哥康复期间支持他。

She vowed to ___stand ___by her brother during his recovery.

我承诺我会支持你度过所有挑战。

I promise I'll ___stand ___by you through all the challenges.

真正的朋友总是在需要时互相支持。

True friends always ___stand ___by each other in times of need.