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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."，推荐阅读旺商聊官方下载获取更多信息
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At the same time, China has been quietly advancing its own plans for a crewed Moon landing.