A CRANE CAN LIFT A BURDEN, move it sideways, and lower it. These operations, which the Greeks employed when building marble temples 25 centuries ago, are now performed every second somewhere around the world as tall ship-to-shore gantry cranes empty and reload container vessels. The two fundamental differences between ancient cranes and the modern versions involve the materials that make up those cranes and the energies that power them.

中文翻译：

---

起重机（机器，不是鸟） - [CrossTalk]

起重机可以举起重物，将其侧向移动，然后将其放下。这些操作是希腊人在 25 世纪前建造大理石寺庙时所采用的，现在每时每刻都在世界各地进行，就像高大的船对岸龙门起重机清空和重新装载集装箱船一样。古代起重机和现代起重机之间的两个根本区别涉及构成这些起重机的材料以及为它们提供动力的能量。