Her prosthetic fin acts like a rudder and keeps her stable. The turtle has learned how to flap her one good flipper in unique ways to change direction.
她的仿生鳍就像个舵，用来保持平衡。这只海龟已经学会用独特的方式划那只完好的鳍来变方向。
I'll pull past the show line, and then I kick in top rudder to come back in the other direction to get locked on the show line, on altitude, on airspeed.
我会一直拉着驾驶杆飞过基准标线，接下来我要蹬舵转向，从相反的方向飞回来，同时对准基准标线、保持住高度和速度。
A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动。
A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动。
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