A put option is a contract that gives its owner the right to sell an asset at a future date at a predetermined price.
Rendering a character as a lower block and then as an upper block gives you two “frames” of motion within the same character and looks much smoother.
，详情可参考51吃瓜
第二十九条 任何个人和组织在互联网上投放广告推广类信息或者提供广告推广中介等服务的，应当遵守以下规定：
If you design your functions to fully consume their arguments then you simply reference (ref)