为比较不同运动强度，研究团队采用代谢当量（MET）作为统一指标。慢走、园艺的代谢当量较低；慢跑、游泳等的代谢当量较高；再乘以每周运动时间，评估总体运动量。研究显示，某些中等强度运动（如快走）与降低死亡风险呈线性关系，但运动并非越多越好。每周约3小时的高强度运动，或六小时的中等强度运动，已足以带来主要的健康效益，超过这个时长并不会获得额外好处。
SwiftUI was the first "everything as code" declarative UI framework I've ever used, and Apple has really nice developer documentation that is again an excellent fit for my particular "tasks and examples"-driven way of thinking.，更多细节参见新收录的资料
。PDF资料是该领域的重要参考
On average, it costs around $1,000 to maintain an acre of cocoa farm in Ghana, and many farmers are concerned they might not be able to recoup their investment.，这一点在新收录的资料中也有详细论述
torch.OutOfMemoryError: CUDA out of memory