rollout
美 ['roʊl.aʊt] 
英 ['rəʊl.aʊt] 
- n.首次展示
 - 网络上线;滑跑;试运行
 
复数:rollouts  
n.  | 1. 首次展示  | 
n.  | 1. the first public display of a new product 2. a launch of a new product that involves gradually increasing the number of outlets where it is available to the public 3. in football, a play in which a quarterback runs with the ball toward the side of the field in order to pass it 4. the introduction of a new product, especially when it gradually becomes available in a large number of places 1. the first public display of a new product 2. a launch of a new product that involves gradually increasing the number of outlets where it is available to the public 3. in football, a play in which a quarterback runs with the ball toward the side of the field in order to pass it 4. the introduction of a new product, especially when it gradually becomes available in a large number of places  |