If it's sitting on a verticalbranch, it'll groom its breast feathers.
如果它坐在垂直的树枝上，它会梳理胸脯的羽毛。
2
This paper made a study on the excited property of the S-wave (transverse wave) from the expression of the verticalbranch cut intergration of the S-wave.
从S波(横波)垂直割线积分的表达式出发，对S波的激发特性进行了研究。
3
The chilled air enters the top of a rack through two vertical standpipes, which branch off into air wands -long, thin pipes lined with vents that release cold air.