average life span

基本解释

The parties he formed, like all Korean parties (in P.J. O’Rourke’s words) had “the average life-span of a trout-stream mayfly hatch”.
他組建的政黨，像其他韓國政黨一樣，用P.J. O’Rourke的話說,“其平均壽命就像鱒魚谿裡一衹蜉蝣的孵化時間”。
This paper gives two methods to determine average life-span of steel products: weighted average method (WAM) and graphic shifting method (GSM) .
本文提出了兩種確定鋼鉄産品平均使用壽命的確定方法：“加權平均法”和“曲線平移法”。
The average life-span of steel products in USA determined by GSM is 24 years in this paper.
採用曲線平移法，確定了美國鋼鉄産品平均使用壽命爲24年。