lifetime; survival period
Refers to the length of time a person, organism, or thing survives or remains functional. Often used in medical, biological, or technical contexts.
This treatment may extend the patient's survival period.
The lifespan in the wild is shorter than in captivity.
寿命 is the more common word for natural lifespan or life expectancy, while 生存期間 is more technical and emphasizes the duration of survival under specific conditions.
process lifetime
Compound of 生存 (survival, existence) and 期間 (period, term). The exact historical derivation is uncertain, but the components are straightforward.