duration
英 [djʊ'reɪʃ(ə)n]
美[du'reʃən]
	    - n. 持续,持续的时间,期间
 - [语音学]音长,音延
 
英英释意
- 1. the period of time during which something continues
 
- 2. the property of enduring or continuing in time
 
- 3. continuance in time;
 - "the ceremony was of short duration"
 - "he complained about the length of time required"