Definition
to refrain from intervening in order to prevent something undesirable from occurring
坐視不理；袖手旁觀
I can't just sit by and watch my friend suffer.
我不能只是坐視不理，看著我的朋友受苦。
He chose to sit by until the problem became impossible to solve.
他選擇袖手旁觀，直到問題變得無法解決。
I will not sit by while this injustice occurs.
我不會坐視這種不公發生。