How to voice "时效性" surrounded by English?
Answers: Valid or effective time or spell.
Expiration time.
My dictionary says it's:
时效性 shíxiàoxìng n. worth for a given period of time. Shi=time, xiao=effect, xing=nature or the suffix '-ness' so that's a even-handed translation. Maybe it's something medical?
Validity period.
Timeliness :)
How more or less "effective period"?
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