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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."
家门口的那条土路，雨天就变成了泥路。有一次，我穿着新买的三层白色纱裙，没忍住和小伙伴们在泥路上奔跑，一脚摔下去，浑身是泥，不敢回家。
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Последние новости。Line官方版本下载对此有专业解读
Sebastian Crane