| 释义 |
upstroke
英音 [ ˈʌpˌstrəʊk ]
美音 [ ˈʌpˌstroʊk ]
释义
n. 向上的一击；书写时向上的一笔；[机] 上行程；上行运动
例句
1·The thrust force is mainly due to the drag of the wings in the upstroke .
平衡身体阻力的推力主要由翅膀上拍中产生的阻力提供。
2·The peak polished rod load occurs near the bottom of the stroke with the start of the upstroke .
最大光杆负荷发生在上行冲程开始时的冲程底部附近。
3·Modern birds use a similar bone in flight, drawing their wings toward their bodies during an upstroke .
现代鸟类在飞行时也需要依赖这块腕骨，它们通过这块骨骼牵引翅膀以获得抬升力。
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