The snow is soft and light and helps control speed.

雪是软的，轻，并有助于控制速度。

The paper gives the vector control speed system of the double-fed machine on the rotor current orientation.

为此我们确定双馈电机调速时的矢量控制策略即转子电流定向的矢量控制。

Approach: Spot the jump early, control speed three bumps early, the last two moguls before the air are key for setting up balance.

接近：提前定位起跳点，提前三个包控制速度，跳起前的最后两个包是设定平衡的关键。

Based on the above study, the author of this paper designed variable frequency control speed system in electric twin-pod propulsion.

基于以上各部分，作者设计出双吊舱变频调速试验系统。