原级：duration
1. 911查询·英语单词
1. He believes infrastructure and utilities are perfect assets for life insurers because of their low volatility and long investment durations.
2. NDRC is responsible for approving the issuance of corporate bonds of durations of more than one year.
3. Durations of corporate bond issuance may be set between three to seven years, while that of enterprise bonds are usually 10 years or above.
4. Yin believed such durations of service have created many problems undermining the army's military capabilities.