如果多个箭头显示一个环形的锁请求模式—由于它们正在相互等候其它线程释放锁，所以线程彼此阻止运行—结果就形成了一个死锁。
If multiple arrows show a circular lock-request pattern — threads prevent each other from running because they are waiting for each other to release a lock — then you have a deadlock.
不过，这种模式的缺点是充电时间较长，车主需要在充电站内长时间等候。
However, the disadvantage of this mode is that the charging takes a long time, and car owners need to wait in the charge station.
在动作模式转换时确保内容再生的时间，提高降低不满的 效果（减轻由于等候时间造成的不满状态的效果）。
When switching an operational mode, the time of reproducing contents is ensured and the effect of reducing dissatisfaction (the dissatisfaction effect due to long waiting time) is improved.
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