| 单词 | riser | 
| 释义 | riserriser /ˈraɪzɚ/ noun [countable] 1early/late riser someone who usually gets out of bed very early or very late2the upright part of a step on a set of stairs3risers [plural] a movable set of wooden or metal steps for a group of people to stand on  | 
	
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