您已经了解了函数索引的定义以及其使用方式和使用时机。
You have now learned the definition of a functional index and have seen how and when to use them.
使用时机器人往往要拖着大量的电缆运行，很是不方便。
When using, the robot often running in tow plenty cable, this is very discommodiousness.
其完美的使用时机和施放位置需要练习，但这绝对值得。
It takes some practice to know where and when to place the shockwave but the effort is worth it.
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