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."
「愛潑斯坦先生提供了一架足以容納我、我的工作人員和美國特勤局隨行人員的飛機，以便協助我前往基金會的慈善工作地點。」克林頓在上個月提交給國會、並由BBC取得的宣誓聲明中如此表示。
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新春伊始，记者走进天津市、重庆市和广东省广州市，循着入境游客的旅程，看消费选择、听真实感受，见证中国开放的大门越开越大。