A put option is a contract that gives its owner the right to sell an asset at a future date at a predetermined price.
With the rocket now on launchpad 39B, the Artemis team is working around the clock to get it ready for lift off.
。快连下载安装对此有专业解读
Александра Синицына (Ночной линейный редактор)
不止手机，笔记本电脑也曾经尝试过硬件集成的防窥功能，惠普当年的 Sure View 技术方案就是其中一例：