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* @param {number[]} nums2 - 基准数组（nums1的元素都来自这里）
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包括近几年，绿联在产品质量上也有点两极分化。
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."