downstroke

1. That's because body text gets to break the consistency rule, especially if your heading fonts are serif fonts ( serif fonts have the little squiggles, like at the end of the downstroke of the "y").
   这是因为主体文本打破了一致性原则，尤其是当标题字体是serif字体的时候（serif字体有一些花体，比如字母“y”的最后一笔的末尾）。
2. 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。
3. Viscosity of produced liquid elevating lead to friction increasing associated with viscosity. That is, force status of sucker rod and tube turn too bad, and the lengthways compressive loads increased in downstroke.
   其中，采出液粘度的增加导致了与粘度有关的各种摩擦力的增加，即抽油杆与油管较水驱时受力状况变差，抽油杆在下行程时纵向压缩载荷增大。

noun

1. a stroke normally made in a downward direction