"I noticed that the brick was a very pink-cast brick, and it had a little bit of a charcoal overlay on it. It was a modular eight-inch brick and it was square-edged," he says. "When I saw that, I knew exactly what the brick was," he adds.
Hi there! I see you're working on a problem about the mean free path of a gas molecule—that's a classic concept in kinetic theory.
。业内人士推荐新收录的资料作为进阶阅读
圖像加註文字，伊朗最高領袖阿里·哈梅內伊遇襲後，伊朗神職人員體系顯得岌岌可危。Article InformationAuthor, 阿米爾·阿齊米（Amir Azimi）
Фото: David Mdzinarishvili / Reuters