三种相位下的涡流场形态各有不同，上挥（下拍）初期前缘涡的运动主要存在两种形态。
The flow fields are different for the three phase motion patterns and there are two types of leading-edge vortex motion at an earlier stage of upstroke or downstroke.
他无比沉迷于此，只要一有机会，就会去球场挥上几杆。
Every chance he could get, he could be found on the golf course swinging away. It was an obsession.
两人开始上长达一小时的课，像往常一样，先要进行几分钟的挥拍热身，先正手再反手。
The two began their one-hour lesson, as usual, with a few minutes of long warm-up rallies, first to the forehand, then to the backhand.
在简述其选型原理及设备结构的基础上，介绍和推荐了一些新型缩聚反应器和脱挥装置。
Several novel polycondensation reactors and devolatilizers are introduced based on the principles of type selection and apparatus structure.
他在学校创办了一个魔术俱乐部，表演魔术，去伦敦的哈姆利玩具店变戏法，把他的名字写在一顶帽子上，每挥一下魔杖，那顶帽子就变大一点，颜色也随之改变——变成红色！
He started a magic club at school, put on shows, demonstrated tricks at Hamley's toyshop in London, put his name to a hat that grew bigger and changed colour with each wave of a wand red!
他在学校创办了一个魔术俱乐部，表演魔术，去伦敦的哈姆利玩具店变戏法，把他的名字写在一顶帽子上，每挥一下魔杖，那顶帽子就变大一点，颜色也随之改变——变成红色！
He started a magic club at school, put on shows, demonstrated tricks at Hamley's toyshop in London, put his name to a hat that grew bigger and changed colour with each wave of a wand red!
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