（五）向场内投掷杂物，不听制止的；
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，这一点在旺商聊官方下载中也有详细论述
so that the "actual computer" was relieved of these menial tasks.
But e-bikes containing lithium-ion batteries are a newer challenge. "When a battery fails, it doesn't necessarily ignite, it will often produce some off-gases," says Stephen Welch, senior lecturer at the University of Edinburgh's Fire Research Centre. "Those off-gases are toxic and flammable. If they accumulate, you can have an explosion risk."