TL;DR: Many clouds support the S3 API. The AWS SDK for Rust works with them too, but you better use .profile_name() for a full profile load instead of manually cherry-picking credentials and region.
Yes! If you lose an AirPod, you can buy a replacement for the right or left AirPod through Apple. AppleCare+ doesn't cover lost or stolen AirPods, so it will cost you. You can use Apple's Get an Estimate tool to calculate the possible cost. The same applies if you lose the Charging Case. Your replacements will be new versions.
。关于这个话题，whatsapp提供了深入分析
constexpr double a1 = -0.2121144;，更多细节参见手游
d = 1.0 + (b1 * x**2)