·2,447,543篇论文数据，部分数据来源于NoteExpress
Besides being deep and hot to handle, the metallic structures are dense and heavy, yet fragile, striated with fractures that the researchers feared would cause them to crumble like dry cake before they reached the surface.
ECONOMIST: 20,000 leagues under the sea
应用推荐
模块上移
模块下移
不移动