饥不择食
A good appetite is a good sauce.

害群之马
black sheep

家丑不可外扬
Don't wash your dirty linen in public.

恩威并济
alternate weakness with severity

旁观者清
The outside sees the best of the game. /Lookers-on see most of the game.

时运不济
to have a bad time

殊途同归
All roads lead to Rome.

众志成城/团结就是力量
Union is strenth.

疾风知劲草
Adversity reveals genius.

设身处地 
Sometimes you have to learn to be in my shoes. 

小Car笔记：
dirty linen：家丑，隐私
alternate：交替，轮流 【常用词组】①alternate current 交流电 ②alternate motion 往复运动，交变运动
reveal：显示，透露，揭示，展现 【常用词组】①reveal itself 出现(呈现) ②reveal one's hand 摊牌