upstroke

1. Be sure to ventilate on the upstroke.
   要明确吹气是在手抬起时吹入的。
2. During the course of the upstroke, the membrane potential attains zero, and an electrical gradient no longer exists.
   在升支发展过程中，膜电位一达到零，电位梯度即不再存在。
3. So, when a bird banks right, its left wing moves faster on the downstroke while the right is faster on the upstroke, which slows the animal's rotation.
   因此，当鸟儿向右侧倾斜飞行时候，它的左翼向下拍打的速度要比右翼向上拍打的速度快一些，这样就可以使旋转减速。
4. There are three stages for each plunger lift cycle: upstroke, after flow and buildup.
   将柱塞举升的单个周期分为三个阶段：柱塞上行阶段、续流阶段和关井压力，恢复阶段，建立了柱塞举升系统模型。
5. The power loss in barrel-plunger pair occurring on the upstroke of a subsurface pump is comprised of leakage loss and friction loss.
   抽油泵上行程提液时柱塞副功率损失包括漏失损失和摩擦损失。
6. 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。
7. Passenger Transport Special Line Upstroke Type 900T Cased Beam Mobile Model Carrier Bridge-building Machine and Construction Technology
   客运专线上行式900吨箱梁移动模架造桥机及施工工艺
8. Therefore a new algorithm of geometrical Pareto evolution algorithm with complex ( GPEC) based on geometrical characters is used to make a multi-objective optimal design for maximum torque factor and polished rod acceleration on the upstroke of a conventional pumping unit.
   为此，采用一种新的集复合形方法和几何选择为一体的多目标Pareto进化算法（GPEC），对常规型抽油机的上冲程最大扭矩因数和上冲程悬点加速度进行多目标优化设计。
9. Neither sodium valproate nor Verapamil showed any effect on action potential amplitude, overshoot, resting potential and phase O upstroke velocity.
   丙戊酸钠和异搏定对动作电位幅度、超射值、静息电位、O期最大除极速度均无明显影响。
10. On the down stroke of the pump, the outer and inner rings provide a fluid passage, and on the upstroke, they play the role of sealing.
    两活塞环在下冲程时提供进液通道，上冲程时起密封作用。

noun

1. a stroke normally made in an upward direction