href = a.get("href", "")
time.sleep(2 ** attempt) # 指数退避
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在美国：传统IT、电力从业者必须向新能源、储能、微网、液冷、能效管理转型，拥抱“算力+能源”复合技能。进入科技巨头能源部门、新能源服务商、储能企业，是抵御风险、提升价值的最优路径。
The LiPlay Plus also includes some fun extra features, such as a layered photo mode that combines images from both cameras into a single shot. It can also record short audio clips, which are saved as a QR code you can place in a corner of the printed photo. Both features are enjoyable to play with, though the layered photo mode can, admittedly, come off as gimmicky. You’re basically just dropping a selfie onto a background image with no way to reposition or resize it.