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."
Путешественники отмечают, что в северных странах действительно больше активностей, и поэтому отпуск кажется более насыщенным
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Other companies are also looking skywards - to make everything from pharmaceuticals to artificial tissues.
第四章 居民会议和居民代表会议