We set off to see the Pyramids and Sphinx.我们出发去看金字塔和狮身人面像。He also studied the ancient stone tablets from around the pyramids.他还研究了在金字塔周围发现的古代石匾。One of the seven wonders of the ancient world was the Pyramids.金字塔是古代世界的七大奇迹...
结果表明,削片机主轴振动是一种混沌运动.Result indicates that combustion vibration of chippers chief shaft is a kind of movement of chaos.这些力的状况影响木片质量 、 削片能耗及削片机的载荷.The forces affect the quality of the chip, cutting energy consumption, and ...