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I've actually found approximately this vulnerability in two separate couriers' tracking pages (and they're using different software). One of them was even worse for them, it included their Stripe private key, I suppose as a bug bounty for people without ethics. And each time I find it, I try to report it.
，详情可参考新收录的资料
Credit: Google screenshot。业内人士推荐新收录的资料作为进阶阅读
And when you want to avoid lossy Bluetooth, the Muo’s USB-C port can also carry audio. Plug it into a computer (or portable media player), hold and press a couple of buttons, and it works as a 24-bit/48 kHz external speaker (depending on compatibility). There is no 3.5 mm aux input, but the USB-C digital connection covers most use cases.
f(x1,x2)=x1⋅Swish(x2)=x1⋅(x2⋅σ(x2))