touch-and-go
adjective informal uk/ˌtʌtʃ.ənˈɡəʊ/ us/ˌtʌtʃ.ənˈɡoʊ/
C2 （形势）不确定的
If a situation is touch-and-go, it is uncertain.
The doctor says that it's touch-and-go whether Mary will be okay. 医生说玛丽能否挺过去还很难说。
Synonyms: parlous precarious
Compare: perilous