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."
A good power bank is essential. Between my phone, headphones, tablet, and smartwatch, I feel like I always have one device or another begging me to plug it in. I actually carry around a power bank with me everywhere due to my chaotic, spontaneous lifestyle and refusal to charge my devices when they aren't actively dying. I purchased my favorite from our extensive list of the Best Power Banks, which features hand-tested picks from my fellow WIRED Reviews gadget experts. Several of their (and my) top picks are on sale right now.
，这一点在雷电模拟器官方版本下载中也有详细论述
对首都北京的规划工作，明确提醒“规划科学是最大的效益，规划失误是最大的浪费，规划折腾是最大的忌讳”；
// drop-oldest: Discard old data to make room