a matter of life and/or death
used to describe a situation that is very important or serious生死攸关的事;成败的关键- You mustn't let anyone know— it's a matter of life and death.你千万别告诉任何人-这可是件生死攸关的事。
- These talks are a matter of life or death for the factory.这些谈话对工厂来说是生死攸关的事情。
See also death | life | matter