Set Duration是什么意思?
确定需要的时间/期限
集合函数
Set Duration调整周期
定期 的意思
设置持续时间
set - 固定不变的 （对某种东西不便)
duration - 持续时间
定期时间/ 固定时间/固定持续时间
duration (d-rshn, dy-)
n.
1. Continuance or persistence in time.
2. A period of existence or persistence: sat quietly through the duration of the speech.
3. The number of years required to receive the present value of future payments, both of interest and principle, of a bond, often used as an indicator of a bond's price volatility resulting from changes in interest rates.
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[Middle English duracioun, from Old French duration, from Medieval Latin drti, drtin-, from Latin drtus, past participle of drre, to last; see deu- in Indo-European roots.]
