share somebody's joys and sorrows 分享他人的快乐和悲伤；同甘共苦

【例句】
These days you need to prove you can draw crowds and own fans that are willing to follow you and share your joys and sorrows.
如今， 你需要证明自己能够引起众人的主意，并且能够拥有一群愿意和你同甘共苦的粉丝。

Good friends should share both joys and sorrows.
好朋友应该同甘共苦。