▼维基百科的解释使用horizontal to the ice,就没有parallel to the ice的疑惑了
Hydroblading
A move in which a skater glides on a deep edge withthe body stretched in a very low position, almost horizontal to the ice.
▼这是Skate Canada官网的解释,比较复杂,我是为了与Shoot the duck的定义作对比才挑这一版
Hydroblading

The skaters are in a low sit-like position that is counter-balanced, where the supporting leg is bent to at least ninety degrees(parallel to the ice) and the free leg and hands are not resting on the ice surface.
The skaters’ torsos, including the shoulders, are leaning far in towards the center of the circle and the free leg is placed tothe outside of that circle.
The move is executed on an edge and on one foot.
▼再看一次Shoot theduck的定义(来源:
https://hermajestytheempressariana.tu
lr.com/post/156236402231/figure-skating-edge-elements)
Shoot the duck

A low position where the supporting leg is on anedge and bent to be parallel to the ice, and the free leg is not resting on theice surface.
The free leg may be straight or bent and may beheld to the front or to the side.
总结:
如果只看 Hydroblading 和 Shoot the duck 的定义会发现他们有共同点:
*滑腿弯曲90度 supporting leg is bent to at least ninety degrees (parallel to the ice)
*浮腿不能放在冰面 free leg are not resting on the icesurface
但是 Hydroblading 要求躯干压得极低,几近贴到冰面
Hydroblading 也可以称为 Hydroblade,也可简称为Hydro