touch and go
情况不稳定，可能是好的也可能是坏的
口语·描述危急或不确定状态
英文释义
something that is uncertain or risky; a situation where the outcome is unpredictable or precarious
例句
The patient's condition was touch and go for a few hours after surgery.
典故来源
源自航空术语，指飞机着陆后立即复飞的危险操作，比喻情况不稳定或风险高。