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."
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Израиль нанес удар по Ирану09:28
“我在深入一线调研的过程中发现，‘内卷式’竞争已经成为制约经济高质量发展的难点堵点。”这是全国政协常委、中国企业财务管理协会会长张连起的真切感受。