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."
Мощный удар Израиля по Ирану попал на видео09:41
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或许，长辈对我们的期待，承载着他们对于“孝”的理解与不安。如果他们与自己的父母之间拥有更稳定、更互相尊重的关系，是否也会对下一代少一些期望投射？