A put option is a contract that gives its owner the right to sell an asset at a future date at a predetermined price.
Mark SavageMusic correspondent
，这一点在safew官方版本下载中也有详细论述
This Tweet is currently unavailable. It might be loading or has been removed.
Maintainer burnout and lack of funding often lead to bugs and serious security incidents,
shading: “semi-realistic highlights”