sit this one out 不参加,不参与(避免危险和问题)
e.g. You're not feeling well today, maybe you should sit this one out. 你今天感觉不太好,也许你应该休息一下不参加这次活动。
e.g. The situation looks dangerous. I think it's best if we sit this one out. 情况看起来很危险,我认为最好我们不参与。
英语从头学