reasonable assumption短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 合理的设想 Perhaps this was once a reasonable assumption, but advances in digital imaging and optics have made it easy to duplicate someone's keys from a distance without them even noticing. 或许这种假设在以前成立，但是数码拍照和光学技术在不断进步，从远处就可以轻而易举地复制你的钥匙，你甚至都不会察觉。 yeeyan