Play back your tracks with the built-in speaker system, and songs can be looped and slowed down without changing the pitch to learn new music.
播放您的音轨与内置的扬声器系统，和歌曲可以循环，减缓不改变音调以学习新的音乐了。
2
And then, according to the features of the looped power supply network, the paper educes the applied calculating methods of two-node power system and more-than-three-node power system respectively.
之后，结合环形供电网络的特点，给出了二节点和三节点以上环形电力系统短路电流的实用计算方法。
3
Such method is open-looped, it is no need of Angle and angle-acceleration transducer, which reduced the cost of the anti-sway control system and promoted the system's dependability.